CN114196981A - Platinum-based high-entropy alloy nanowire catalyst and preparation method thereof - Google Patents
Platinum-based high-entropy alloy nanowire catalyst and preparation method thereof Download PDFInfo
- Publication number
- CN114196981A CN114196981A CN202111473560.5A CN202111473560A CN114196981A CN 114196981 A CN114196981 A CN 114196981A CN 202111473560 A CN202111473560 A CN 202111473560A CN 114196981 A CN114196981 A CN 114196981A
- Authority
- CN
- China
- Prior art keywords
- platinum
- entropy alloy
- based high
- acetylacetonate
- alloy nanowire
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Images
Classifications
-
- C—CHEMISTRY; METALLURGY
- C25—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; APPARATUS THEREFOR
- C25B—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES FOR THE PRODUCTION OF COMPOUNDS OR NON-METALS; APPARATUS THEREFOR
- C25B11/00—Electrodes; Manufacture thereof not otherwise provided for
- C25B11/04—Electrodes; Manufacture thereof not otherwise provided for characterised by the material
- C25B11/051—Electrodes formed of electrocatalysts on a substrate or carrier
- C25B11/055—Electrodes formed of electrocatalysts on a substrate or carrier characterised by the substrate or carrier material
- C25B11/057—Electrodes formed of electrocatalysts on a substrate or carrier characterised by the substrate or carrier material consisting of a single element or compound
- C25B11/065—Carbon
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
- B22F9/00—Making metallic powder or suspensions thereof
- B22F9/16—Making metallic powder or suspensions thereof using chemical processes
- B22F9/18—Making metallic powder or suspensions thereof using chemical processes with reduction of metal compounds
- B22F9/24—Making metallic powder or suspensions thereof using chemical processes with reduction of metal compounds starting from liquid metal compounds, e.g. solutions
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B82—NANOTECHNOLOGY
- B82Y—SPECIFIC USES OR APPLICATIONS OF NANOSTRUCTURES; MEASUREMENT OR ANALYSIS OF NANOSTRUCTURES; MANUFACTURE OR TREATMENT OF NANOSTRUCTURES
- B82Y30/00—Nanotechnology for materials or surface science, e.g. nanocomposites
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B82—NANOTECHNOLOGY
- B82Y—SPECIFIC USES OR APPLICATIONS OF NANOSTRUCTURES; MEASUREMENT OR ANALYSIS OF NANOSTRUCTURES; MANUFACTURE OR TREATMENT OF NANOSTRUCTURES
- B82Y40/00—Manufacture or treatment of nanostructures
-
- C—CHEMISTRY; METALLURGY
- C25—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; APPARATUS THEREFOR
- C25B—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES FOR THE PRODUCTION OF COMPOUNDS OR NON-METALS; APPARATUS THEREFOR
- C25B1/00—Electrolytic production of inorganic compounds or non-metals
- C25B1/01—Products
- C25B1/02—Hydrogen or oxygen
- C25B1/04—Hydrogen or oxygen by electrolysis of water
-
- C—CHEMISTRY; METALLURGY
- C25—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; APPARATUS THEREFOR
- C25B—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES FOR THE PRODUCTION OF COMPOUNDS OR NON-METALS; APPARATUS THEREFOR
- C25B11/00—Electrodes; Manufacture thereof not otherwise provided for
- C25B11/04—Electrodes; Manufacture thereof not otherwise provided for characterised by the material
- C25B11/051—Electrodes formed of electrocatalysts on a substrate or carrier
- C25B11/073—Electrodes formed of electrocatalysts on a substrate or carrier characterised by the electrocatalyst material
- C25B11/075—Electrodes formed of electrocatalysts on a substrate or carrier characterised by the electrocatalyst material consisting of a single catalytic element or catalytic compound
- C25B11/089—Alloys
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/30—Hydrogen technology
- Y02E60/36—Hydrogen production from non-carbon containing sources, e.g. by water electrolysis
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/30—Hydrogen technology
- Y02E60/50—Fuel cells
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Nanotechnology (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Materials Engineering (AREA)
- Organic Chemistry (AREA)
- Electrochemistry (AREA)
- Metallurgy (AREA)
- Physics & Mathematics (AREA)
- Condensed Matter Physics & Semiconductors (AREA)
- General Physics & Mathematics (AREA)
- Crystallography & Structural Chemistry (AREA)
- Manufacturing & Machinery (AREA)
- Inorganic Chemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Composite Materials (AREA)
- Catalysts (AREA)
Abstract
The invention discloses a platinum-based high-entropy alloy nanowire catalyst and a preparation method thereof, wherein the platinum-based high-entropy alloy nanowire catalyst comprises a carbon carrier and a multi-element platinum-based high-entropy alloy nanowire loaded on the carbon carrier, contains 5-10 elements, has a face-centered cubic lattice (FCC) single-phase solid solution structure and one-dimensional morphology characteristics, and has a linear diameter of sub-nanometer or nanometer size, and the molar ratio of each element is 5-35%; according to the preparation method, a metal salt precursor and a surfactant/reducing agent are dissolved in an oil amine solvent, the reaction kinetics of the forming process of the multi-element platinum-based high-entropy alloy nanowire can be accurately regulated and controlled by controlling the concentration, the ultrasonic dispersion degree, the heating rate, the reaction temperature, the reaction time and other conditions of the metal salt precursor and the surfactant/reducing agent, the reaction conditions are mild, the operation is simple, the microstructure of the prepared platinum-based high-entropy alloy nanomaterial is controllable, and the preparation method has important significance in the research of the platinum-based multi-metal alloy.
Description
Technical Field
The invention belongs to the technical field of catalysts, and particularly relates to a platinum-based high-entropy alloy nanowire catalyst and a preparation method thereof.
Background
Hydrogen (H)2) The hydrogen-rich carbon dioxide hydrogen fuel has the advantages of light weight, high heat value (3 times of petroleum and 4.5 times of coal), cleanness and environmental protection, is an ideal green strategic energy source, and how to realize the clean preparation and utilization of hydrogen becomes an important task for promoting the realization of carbon peak reaching and carbon neutralization targets at present. The electric/photochemical hydrogen production by utilizing renewable energy sources is widely concerned due to the characteristics of simplicity, feasibility and no pollution in the whole process. However, the hydrogen production catalyst by electrolysis of water currently used in industry is a platinum/carbon catalyst, which has low intrinsic activity and is liable to particle accumulation accompanying the reaction, resulting in low catalytic stability. Therefore, the development of hydrogen production catalytic materials having excellent catalytic activity and stability is urgently needed.
The platinum and transition metal M alloy can effectively adjust the adsorption energy of metal surface atoms and H-intermediate in the hydrogen evolution process, but the traditional alloy strategy is limited to binary and small amount of ternary alloy, the component range of alloy atoms is limited, the electronic structure regulation and adsorption energy optimization capacity of the platinum is limited, and the catalytic activity is difficult to realize maximization. The entropy of the alloy material is continuously increased along with the increase of the element types, when the element types are increased to five or more than five, the high-entropy alloy is formed, a large number of unique binding sites on the multi-component complex surface provide possibility for obtaining a nearly continuous adsorption energy distribution, and the strain effect caused by the lattice distortion has a positive effect on the catalytic activity. Meanwhile, the delayed diffusion effect is beneficial to maintaining the structure and the components, so that the high-entropy alloy hydrogen evolution material shows excellent durability in a severe working environment.
In recent years, although the preparation of high-entropy alloy nano materials has been advanced to a certain extent, the reported strategies such as a carbon thermal impact method, a nano droplet-mediated electrodeposition method, dealloying and the like have strict requirements on preparation conditions, the complexity of an operation process is increased, and the structure of a catalytic material is difficult to accurately control. In the wet chemical preparation method which shows great potential in the low-entropy alloy, due to the difference of reduction potential and thermal decomposition temperature of each atom and the like, the kinetic barrier of mixing various elements is required to be overcome to avoid phase separation in the alloy process, the regulation and control of the components and the size of zero-dimensional high-entropy nano particles are only realized at present, and the regulation and control of a fine structure are rarely reported. In view of the great difficulty in mixing various elements on the nanometer scale, the research on the preparation method of the platinum-based high-entropy material is very deficient. Therefore, in the present stage, a preparation method of a platinum-based high-entropy alloy nano material with simple operation and controllable structure is needed to be invented.
Disclosure of Invention
Therefore, in order to achieve the above objects, the present invention aims to provide a platinum-based high-entropy alloy nanowire catalyst and a preparation method thereof, wherein the platinum-based high-entropy alloy nanowire catalyst has high efficiency, stability, excellent electrocatalytic performance, and a preparation method thereof is simple, feasible and convenient for mass production.
On one hand, the invention provides a platinum-based high-entropy alloy nanowire catalyst, which comprises a carbon carrier and a plurality of platinum-based high-entropy alloy nanowires loaded on the carbon carrier, wherein the plurality of platinum-based high-entropy alloy nanowires contain 5-10 elements, the molar ratio of each element is 5-35%, the platinum-based high-entropy alloy nanowire catalyst has a face-centered cubic lattice (FCC) single-phase solid solution structure and a one-dimensional morphology characteristic, and the wire diameter is in a sub-nanometer or nanometer size; wherein, the 5-10 elements comprise platinum element, molybdenum element, and at least three of iridium element, rhodium element, ruthenium element, nickel element, cobalt element, iron element, manganese element and chromium element.
Preferably, the multi-element platinum-based high-entropy alloy nanowire is a pentabasic platinum-based high-entropy alloy nanowire, a hexabasic platinum-based high-entropy alloy nanowire, a heptabasic platinum-based high-entropy alloy nanowire, an octabasic platinum-based high-entropy alloy nanowire, a nonabasic platinum-based high-entropy alloy nanowire or a decabasic platinum-based high-entropy alloy nanowire.
As a preferable mode of the invention, the length of the multi-element platinum-based high-entropy alloy nanowire is 30-200nm, and the wire diameter is 0.8-1.5 nm.
On the other hand, the invention further provides a preparation method for preparing the platinum-based high-entropy alloy nanowire catalyst, which comprises the following steps:
step one, preparing a metal salt precursor solution, specifically: weighing a certain amount of platinum acetylacetonate, molybdenum hexacarbonyl and other metal salt precursors, dissolving the platinum acetylacetonate, the molybdenum hexacarbonyl and the other metal salt precursors in an oleylamine solvent according to the concentration of 2.5mg/mL, 5mg/mL and 0-2.5mg/mL respectively, and ultrasonically stirring for a certain time to prepare a turbid and uniform colloidal metal salt precursor solution; wherein the other metal salt precursor is at least three selected from iridium acetylacetonate, rhodium acetylacetonate, ruthenium acetylacetonate, nickel acetylacetonate, cobalt acetylacetonate, iron acetylacetonate, manganese acetylacetonate and chromium acetylacetonate, and the dissolving of the other metal salt precursor in the oleylamine solvent according to the concentration of 0-2.5mg/mL specifically means that each metal salt precursor in the other metal salt precursor is dissolved in the oleylamine solvent according to the concentration of 0-2.5mg/mL respectively;
step two, preparing a surfactant and reducing agent solution, which specifically comprises the following steps: respectively dissolving a surfactant and a reducing agent in an oleylamine solvent according to the concentration of 2.5-15mg/mL, ultrasonically stirring for a certain time, and uniformly dispersing and mixing to obtain a surfactant and reducing agent solution; wherein, the surfactant is quaternary ammonium salt, and the reducing agent is polyhydroxy aldehyde;
step three, preparing the multi-element platinum-based high-entropy alloy nanowire, which specifically comprises the following steps: putting the metal salt precursor solution prepared in the step one into a reaction container, then pouring the surfactant and the reducing agent solution prepared in the step two into the metal salt precursor solution in the reaction container, then ultrasonically stirring for a certain time and uniformly mixing to obtain a dispersion liquid, then sealing the reaction container containing the dispersion liquid and transferring the reaction container into an oil bath pot for oil bath heating, keeping the temperature after the dispersion liquid is heated to 200-230 ℃, allowing the dispersion liquid to react for 60-90 minutes at the temperature of 200-230 ℃ to generate a black colloidal solution, then stopping heating, after cooling the reaction container to room temperature, adding a certain amount of cyclohexane/ethanol mixed solution into the black colloidal solution, then centrifugally treating for a certain time, then cleaning with the cyclohexane/ethanol mixed solution to obtain the multi-platinum-based high-entropy alloy nanowire, dispersing the obtained multi-element platinum-based high-entropy alloy nanowire in cyclohexane to prepare a standby liquid;
step four, preparing the platinum-based high-entropy alloy nanowire catalyst, which specifically comprises the following steps: weighing a certain amount of carbon carrier, ultrasonically dispersing the carbon carrier in a cyclohexane/ethanol mixed solution to prepare a carbon dispersion liquid with the concentration of 0.5mg/mL, then pouring the standby liquid prepared in the step three into the carbon dispersion liquid according to the proportion that the mass percent of metal on the carbon material is 20%, ultrasonically stirring for a certain time, then centrifuging for a certain time, then cleaning by using an ethanol solution, and finally drying the product in a natural environment to obtain the platinum-based high-entropy alloy nanowire catalyst.
Preferably, the oil bath pan transferred in the third step is an oil bath pan with the temperature of 50-80 ℃, and the oil bath heating time is 5-20 minutes.
In a preferred embodiment of the present invention, the volume ratio of the cyclohexane/ethanol mixed solution used in step three is 1: 3.
As a preferred carbon support of the present invention, the carbon support used in step four is a commercial carbon support (Ketjen black, KB), and its source is not limited, and it is commercially available as well known to those skilled in the art.
Preferably, in the first step, the ultrasonic agitation is carried out for a certain time of 60-80 minutes; and/or in the second step, the ultrasonic stirring is carried out for 30 minutes; and/or in the third step, the ultrasonic stirring is carried out for 10-30 minutes in a certain time, and the centrifugal treatment is carried out for 5 minutes in a certain time of 8000-; and/or in the fourth step, the ultrasonic stirring is carried out for 60-90 minutes in a certain time, and the centrifugal treatment is carried out for 5 minutes in a certain time of 8000 r/min.
Preferably, in the third step, the washing times with the cyclohexane/ethanol mixed solution are 2-3 times; and/or in the fourth step, the washing times with the ethanol solution are 2-3 times.
The preparation method provided by the invention is essentially based on a wet chemistry-sol-gel preparation method, a metal salt precursor and a surfactant/reducing agent are dissolved in an oil amine solvent, quaternary ammonium salt is used as a structure directing agent, polyhydroxy aldehyde is used as a reducing agent, and the reaction kinetics of the forming process of the multi-element platinum-based high-entropy alloy nanowire can be accurately regulated and controlled by controlling the concentration, the ultrasonic dispersion degree, the heating rate, the reaction temperature, the reaction time and other conditions of the metal salt precursor and the surfactant/reducing agent, the reaction conditions are mild, the operation is simple, the microstructure of the prepared platinum-based high-entropy alloy nanomaterial is controllable, and the preparation method has important significance in the research of the platinum-based multi-metal alloy.
Compared with the prior art, the preparation method provided by the invention has the following beneficial technical effects:
(1) the preparation condition is mild (200-.
(2) The five-to ten-element series one-dimensional platinum-based high-entropy alloy nano/sub-nanowire with controllable element composition and microstructure can be prepared, and the traditional thought for preparing high-entropy alloy in the past is broken through.
Drawings
The foregoing and/or additional aspects and advantages of the present invention will become apparent and readily appreciated from the following description of the embodiments, taken in conjunction with the accompanying drawings. In the drawings, like reference numerals refer to the same or similar parts or elements throughout the several views unless otherwise specified. The figures are not necessarily to scale. It is appreciated that these drawings depict only some embodiments in accordance with the disclosure and are therefore intended to provide a further understanding of the invention, and are not to be considered limiting of its scope, as it is defined by the present application. Wherein:
FIG. 1 is an aberration-corrected high-angle annular dark field image of a ten-element platinum-based high-entropy alloy nanowire prepared by the invention;
FIG. 2 is a scanning transmission microscope image of a ten-element platinum-based high-entropy alloy nanowire prepared by the present invention;
FIG. 3 is an X-ray diffraction pattern of a ten-element platinum-based high-entropy alloy nanowire prepared by the invention;
FIG. 4 is an element distribution diagram of a ten-element platinum-based high-entropy alloy nanowire prepared by the method.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention will be described in detail with reference to the accompanying drawings and specific embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and should not be taken to be limiting.
Firstly, the invention provides a platinum-based high-entropy alloy nanowire catalyst, which comprises a carbon carrier and a multi-element platinum-based high-entropy alloy nanowire loaded on the carbon carrier, wherein the multi-element platinum-based high-entropy alloy nanowire contains 5-10 elements including platinum element, molybdenum element and at least three of iridium element, rhodium element, ruthenium element, nickel element, cobalt element, iron element, manganese element and chromium element, the molar ratio of each element is 5-35%, the catalyst has a face-centered cubic lattice (FCC) single-phase solid solution structure and a one-dimensional morphology characteristic, and the wire diameter is in a sub-nanometer or nanometer size.
The multi-element platinum-based high-entropy alloy nanowire is a pentabasic platinum-based high-entropy alloy nanowire, a hexabasic platinum-based high-entropy alloy nanowire, a heptabasic platinum-based high-entropy alloy nanowire, an octabasic platinum-based high-entropy alloy nanowire, a nonabasic platinum-based high-entropy alloy nanowire or a decabasic platinum-based high-entropy alloy nanowire, the length of the multi-element platinum-based high-entropy alloy nanowire is 30-200nm, and the wire diameter of the multi-element platinum-based high-entropy alloy nanowire is 0.8-1.5 nm.
Fig. 1-2 show the morphology and structural features of the ten-element platinum-based high-entropy alloy nanowire prepared by the invention, the ten-element platinum-based high-entropy alloy nanowire has a nanometer-sized diameter and a one-dimensional nanowire morphology, the diameter of the ten-element platinum-based high-entropy alloy nanowire is about 1.5nm, fig. 3 shows that the ten-element platinum-based high-entropy alloy nanowire is a face-centered cubic lattice (FCC) single-phase solid solution structure, and fig. 4 shows the distribution features of each element in the ten-element platinum-based high-entropy alloy nanowire, and each element in the nanowire is uniformly distributed as shown in fig. 4.
Further, the invention provides a preparation method for preparing the platinum-based high-entropy alloy nanowire catalyst, which comprises the following specific steps:
example 1
1) Weighing a certain amount of platinum acetylacetonate, molybdenum hexacarbonyl and another metal salt precursor, wherein the another metal salt precursor can be iridium acetylacetonate, nickel acetylacetonate and cobalt acetylacetonate, then dissolving platinum acetylacetonate, molybdenum hexacarbonyl, iridium acetylacetonate, nickel acetylacetonate and cobalt acetylacetonate in the concentration of 2.50mg/mL, 5.00mg/mL, 2.00mg/mL and 1.50mg/mL respectively in an oleylamine solvent, and ultrasonically stirring for 60 minutes to uniformly disperse the metal salt precursor into a colloid to prepare a turbid and uniform colloidal metal salt precursor solution;
2) dissolving quaternary ammonium salt and polyhydroxy aldehyde in oleylamine according to the concentration of 2.5-15mg/mL respectively, ultrasonically stirring for 30 minutes, and dispersing and uniformly mixing to obtain a surfactant and reducing agent solution;
3) putting the prepared metal salt precursor solution into a reaction bottle, then pouring the prepared surfactant and reducing agent solution into the metal salt precursor solution in the reaction bottle, ultrasonically stirring for 10 minutes, uniformly mixing to obtain a dispersion liquid, then covering and sealing the reaction bottle containing the dispersion liquid, transferring the reaction bottle containing the dispersion liquid into an oil bath kettle at 50 ℃, heating for 5 minutes, heating to 200 ℃, keeping the temperature for 60 minutes, reacting the dispersion liquid at 200 ℃ for 60 minutes to generate a black colloidal solution, then stopping heating, after the reaction bottle is cooled to room temperature, adding a cyclohexane/ethanol mixed solution with a volume ratio of 1:3 into the black colloidal solution, then carrying out centrifugal treatment at 9500r/min for a certain time, then cleaning for a plurality of times by using the cyclohexane/ethanol mixed solution to obtain the five-membered platinum-based high-entropy alloy nanowire (PtIrMoNiCo) with the diameter of about 0.8nm and the sub-nanometer size, dispersing the obtained penta-platinum-based high-entropy alloy nanowires in cyclohexane to prepare a standby solution;
4) weighing a certain amount of commercial carbon carrier (Ketjen black, KB) and ultrasonically dispersing the Ketjen black, KB into a cyclohexane/ethanol mixed solution to prepare a carbon dispersion liquid with the concentration of 0.5mg/mL, then pouring the prepared standby liquid into the carbon dispersion liquid according to the proportion that the mass percent of metal on the carbon material is 20%, then ultrasonically stirring for 60 minutes, then centrifugally treating for 5 minutes at 8000r/min, then cleaning for 2-3 times by using an ethanol solution, and finally drying the product in a natural environment to obtain the five-element platinum-based high-entropy alloy nanowire catalyst.
Example 2
1) Weighing a certain amount of platinum acetylacetonate, molybdenum hexacarbonyl and another metal salt precursor, wherein the another metal salt precursor can be iridium acetylacetonate, iron acetylacetonate, nickel acetylacetonate and cobalt acetylacetonate, then respectively dissolving platinum acetylacetonate, molybdenum hexacarbonyl, iridium acetylacetonate, iron acetylacetonate, nickel acetylacetonate and cobalt acetylacetonate in the concentration of 2.50mg/mL, 5.00mg/mL, 2.00mg/mL, 1.50mg/mL and 1.50mg/mL in an oleylamine solvent, and ultrasonically stirring for 60 minutes to uniformly disperse the metal salt precursor into a colloid state to prepare a turbid and uniform colloidal metal salt precursor solution;
2) dissolving quaternary ammonium salt and polyhydroxy aldehyde in oleylamine according to the concentration of 2.5-15mg/mL respectively, ultrasonically stirring for 30 minutes, and dispersing and uniformly mixing to obtain a surfactant and reducing agent solution;
3) putting the prepared metal salt precursor solution into a reaction bottle, then pouring the prepared surfactant and reducing agent solution into the metal salt precursor solution in the reaction bottle, ultrasonically stirring for 10 minutes, uniformly mixing to obtain a dispersion liquid, then covering and sealing the reaction bottle containing the dispersion liquid, transferring the reaction bottle containing the dispersion liquid into a 60 ℃ oil bath pan, carrying out oil bath heating for 5 minutes, heating to 220 ℃, then carrying out heat preservation for 80 minutes, namely allowing the dispersion liquid to react for 80 minutes at the temperature of 220 ℃ to generate a black colloidal solution, then stopping heating, after the reaction bottle is cooled to room temperature, adding a cyclohexane/ethanol mixed solution with the volume ratio of 1:3 into the black colloidal solution, then carrying out centrifugal treatment at 9500r/min for a certain time, then cleaning for a plurality of times by using the cyclohexane/ethanol mixed solution, thus obtaining the platinum hexabasic high-entropy alloy nanowire (PtIrMoNiCoFe) with the diameter of about 0.8nm and the sub-nanometer size, dispersing the obtained hexabasic platinum-based high-entropy alloy nanowire in cyclohexane to prepare a standby liquid;
4) weighing a certain amount of commercial carbon carrier (Ketjen black, KB) and ultrasonically dispersing the Ketjen black, KB into a cyclohexane/ethanol mixed solution to prepare a carbon dispersion liquid with the concentration of 0.5mg/mL, then pouring the prepared standby liquid into the carbon dispersion liquid according to the proportion that the mass percent of metal on the carbon material is 20%, then ultrasonically stirring for 80 minutes, then centrifugally treating for 5 minutes at 8000r/min, then cleaning for 2-3 times by using an ethanol solution, and finally placing the product in a natural environment for drying to obtain the six-element platinum-based high-entropy alloy nanowire catalyst.
Example 3
1) Weighing a certain amount of platinum acetylacetonate, molybdenum hexacarbonyl and another metal salt precursor, wherein the another metal salt precursor can be iridium acetylacetonate, rhodium acetylacetonate, nickel acetylacetonate, cobalt acetylacetonate and iron acetylacetonate, then respectively dissolving platinum acetylacetonate, molybdenum hexacarbonyl, iridium acetylacetonate, rhodium acetylacetonate, nickel acetylacetonate, cobalt acetylacetonate and iron acetylacetonate in an oleylamine solvent at the concentrations of 2.50mg/mL, 5.00mg/mL, 2.00mg/mL, 1.50mg/mL and 1.50mg/mL, ultrasonically stirring for 70 minutes to uniformly disperse the materials into a colloid state, and preparing a turbid and uniform colloidal metal salt precursor solution;
2) dissolving quaternary ammonium salt and polyhydroxy aldehyde in oleylamine according to the concentration of 2.5-15mg/mL respectively, ultrasonically stirring for 30 minutes, and dispersing and uniformly mixing to obtain a surfactant and reducing agent solution;
3) putting the prepared metal salt precursor solution into a reaction bottle, then pouring the prepared surfactant and reducing agent solution into the metal salt precursor solution in the reaction bottle, ultrasonically stirring for 10 minutes, uniformly mixing to obtain a dispersion liquid, then covering and sealing the reaction bottle containing the dispersion liquid, transferring the reaction bottle containing the dispersion liquid into a 60 ℃ oil bath pot, carrying out oil bath heating for 5 minutes, heating to 220 ℃ and then keeping the temperature for 80 minutes, namely allowing the dispersion liquid to react for 80 minutes at 220 ℃ to generate a black colloidal solution, then stopping heating, after the reaction bottle is cooled to room temperature, adding a cyclohexane/ethanol mixed solution with a volume ratio of 1:3 into the black colloidal solution, then carrying out centrifugal treatment for a certain time at 9000r/min, then cleaning for several times by using the cyclohexane/ethanol mixed solution to obtain the heptatomic platinum-based high-entropy alloy nanowire (PtRhMoIrCoNiFe) with the diameter of about 1.0nm and the size of sub-nanometer, dispersing the obtained seven-element platinum-based high-entropy alloy nanowire in cyclohexane to prepare a standby liquid;
4) weighing a certain amount of commercial carbon carrier (Ketjen black, KB) and ultrasonically dispersing the Ketjen black, KB into a cyclohexane/ethanol mixed solution to prepare a carbon dispersion liquid with the concentration of 0.5mg/mL, then pouring the prepared standby liquid into the carbon dispersion liquid according to the proportion that the mass percent of metal on the carbon material is 20%, then ultrasonically stirring for 80 minutes, then centrifugally treating for 5 minutes at 8000r/min, then cleaning for 2-3 times by using an ethanol solution, and finally drying the product in a natural environment to obtain the seven-element platinum-based high-entropy alloy nanowire catalyst.
Example 4
1) Weighing a certain amount of platinum acetylacetonate, molybdenum hexacarbonyl and another metal salt precursor, wherein the another metal salt precursor can be iridium acetylacetonate, rhodium acetylacetonate, ruthenium acetylacetonate, nickel acetylacetonate, cobalt acetylacetonate and iron acetylacetonate, then dissolving platinum acetylacetonate, molybdenum hexacarbonyl, iridium acetylacetonate, rhodium acetylacetonate, ruthenium acetylacetonate, nickel acetylacetonate, cobalt acetylacetonate and iron acetylacetonate in an oil amine solvent respectively at the concentration of 2.50mg/mL, 5.00mg/mL, 2.00mg/mL, 1.50mg/mL and 1.50mg/mL, ultrasonically stirring for 70 minutes to uniformly disperse the precursor into a colloid, and preparing a turbid and uniform colloidal metal salt precursor solution;
2) dissolving quaternary ammonium salt and polyhydroxy aldehyde in oleylamine according to the concentration of 2.5-15mg/mL respectively, ultrasonically stirring for 30 minutes, and dispersing and uniformly mixing to obtain a surfactant and reducing agent solution;
3) putting the prepared metal salt precursor solution into a reaction bottle, then pouring the prepared surfactant and reducing agent solution into the metal salt precursor solution in the reaction bottle, ultrasonically stirring for 10 minutes, uniformly mixing to obtain a dispersion liquid, then sealing the reaction bottle containing the dispersion liquid with a cover, transferring the reaction bottle into an oil bath kettle at 80 ℃, heating for 5 minutes, heating to 220 ℃, keeping the temperature for 80 minutes, reacting the dispersion liquid at 220 ℃ for 80 minutes to generate a black colloidal solution, then stopping heating, after the reaction bottle is cooled to room temperature, adding a cyclohexane/ethanol mixed solution with the volume ratio of 1:3 into the black colloidal solution, then centrifuging for a certain time at 9000r/min, then cleaning for a plurality of times with the cyclohexane/ethanol mixed solution to obtain the nanometer-sized eight-element platinum-based high-entropy alloy nanowire (PtRhMoIrCoRuFeNi) with the diameter of about 1.3nm, dispersing the obtained eight-element platinum-based high-entropy alloy nanowire in cyclohexane to prepare a standby liquid;
4) weighing a certain amount of commercial carbon carrier (Ketjen black, KB) and ultrasonically dispersing the commercial carbon carrier in a cyclohexane/ethanol mixed solution to prepare a carbon dispersion liquid with the concentration of 0.5mg/mL, then pouring the prepared standby liquid into the carbon dispersion liquid according to the proportion that the mass percent of metal on the carbon material is 20%, then ultrasonically stirring for 80 minutes, then centrifugally treating for 5 minutes at 8000r/min, then cleaning for 2-3 times by using an ethanol solution, and finally drying the product in a natural environment to obtain the eight-element platinum-based high-entropy alloy nanowire catalyst.
Example 5
1) Weighing a certain amount of platinum acetylacetonate, molybdenum hexacarbonyl and another metal salt precursor, wherein the another metal salt precursor can be iridium acetylacetonate, rhodium acetylacetonate, ruthenium acetylacetonate, nickel acetylacetonate, cobalt acetylacetonate, iron acetylacetonate and manganese acetylacetonate, and then dissolving platinum acetylacetonate, molybdenum hexacarbonyl, iridium acetylacetonate, rhodium acetylacetonate, ruthenium acetylacetonate, nickel acetylacetonate, cobalt acetylacetonate, iron acetylacetonate and manganese acetylacetonate in an oleylamine solvent at the concentration of 2.50mg/mL, 5.00mg/mL, 2.00mg/mL, 1.50mg/mL and 1.50mg/mL respectively, and ultrasonically stirring for 80 minutes to uniformly disperse the metal salt precursor into a colloid state to prepare a uniform colloidal metal salt precursor solution;
2) dissolving quaternary ammonium salt and polyhydroxy aldehyde in oleylamine according to the concentration of 2.5-15mg/mL respectively, ultrasonically stirring for 30 minutes, and dispersing and uniformly mixing to obtain a surfactant and reducing agent solution;
3) putting the prepared metal salt precursor solution into a reaction bottle, then pouring the prepared surfactant and reducing agent solution into the metal salt precursor solution in the reaction bottle, ultrasonically stirring for 10 minutes, uniformly mixing to obtain a dispersion liquid, then sealing the reaction bottle containing the dispersion liquid with a cover, transferring the reaction bottle into an oil bath kettle at 80 ℃, heating for 5 minutes, heating to 230 ℃, keeping the temperature for 90 minutes, reacting the dispersion liquid at 230 ℃ for 90 minutes to generate a black colloidal solution, then stopping heating, after the reaction bottle is cooled to room temperature, adding a cyclohexane/ethanol mixed solution with the volume ratio of 1:3 into the black colloidal solution, then carrying out centrifugal treatment at 8500r/min for a certain time, then cleaning the cyclohexane/ethanol mixed solution for a plurality of times to obtain the nine-element platinum-based high-entropy alloy nanowire (PtRhMoIrCoRuFeNiMn) with the diameter of about 1.3nm and the nanometer size, dispersing the obtained nine-element platinum-based high-entropy alloy nanowire in cyclohexane to prepare a standby solution;
4) weighing a certain amount of commercial carbon carrier (Ketjen black, KB) and ultrasonically dispersing the Ketjen black, KB into a cyclohexane/ethanol mixed solution to prepare a carbon dispersion liquid with the concentration of 0.5mg/mL, then pouring the prepared standby liquid into the carbon dispersion liquid according to the proportion that the mass percent of metal on the carbon material is 20%, then ultrasonically stirring for 80 minutes, then centrifugally treating for 5 minutes at 8000r/min, then cleaning for 2-3 times by using an ethanol solution, and finally drying the product in a natural environment to obtain the nine-element platinum-based high-entropy alloy nanowire catalyst.
Example 6
1) Weighing a certain amount of platinum acetylacetonate, molybdenum hexacarbonyl and another metal salt precursor, wherein the another metal salt precursor can be iridium acetylacetonate, rhodium acetylacetonate, ruthenium acetylacetonate, nickel acetylacetonate, cobalt acetylacetonate, iron acetylacetonate, manganese acetylacetonate and chromium acetylacetonate, then dissolving platinum acetylacetonate, molybdenum hexacarbonyl, iridium acetylacetonate, rhodium acetylacetonate, ruthenium acetylacetonate, nickel acetylacetonate, cobalt acetylacetonate, iron acetylacetonate, manganese acetylacetonate and chromium acetylacetonate in the oil amine solvent respectively in the concentration of 2.50mg/mL, 5.00mg/mL, 2.00mg/mL, 1.50mg/mL and 1.50mg/mL, ultrasonically stirring for 80 minutes to uniformly disperse the metal salt into a colloid state, and preparing a turbid and uniform colloidal metal salt precursor solution;
2) dissolving quaternary ammonium salt and polyhydroxy aldehyde in oleylamine according to the concentration of 2.5-15mg/mL respectively, ultrasonically stirring for 30 minutes, and dispersing and uniformly mixing to obtain a surfactant and reducing agent solution;
3) putting the prepared metal salt precursor solution into a reaction bottle, then pouring the prepared surfactant and reducing agent solution into the metal salt precursor solution in the reaction bottle, ultrasonically stirring for 10 minutes, uniformly mixing to obtain a dispersion liquid, then sealing the reaction bottle containing the dispersion liquid with a cover, transferring the reaction bottle into an oil bath kettle at 80 ℃, heating for 5 minutes, heating to 230 ℃, keeping the temperature for 90 minutes, reacting the dispersion liquid at 230 ℃ for 90 minutes to generate a black colloidal solution, then stopping heating, after the reaction bottle is cooled to room temperature, adding a cyclohexane/ethanol mixed solution with the volume ratio of 1:3 into the black colloidal solution, then carrying out centrifugal treatment at 8000r/min for a certain time, then cleaning for a plurality of times by using the cyclohexane/ethanol mixed solution to obtain the ten-element platinum-based high-entropy alloy nanowire (PtRhMoIrCoRuFeNiMnCr) with the diameter of about 1.5nm and the nanometer size, dispersing the obtained ten-element platinum-based high-entropy alloy nanowire in cyclohexane to prepare a standby solution;
4) weighing a certain amount of commercial carbon carrier (Ketjen black, KB) and ultrasonically dispersing the Ketjen black, KB into a cyclohexane/ethanol mixed solution to prepare a carbon dispersion liquid with the concentration of 0.5mg/mL, then pouring the prepared standby liquid into the carbon dispersion liquid according to the proportion that the mass percent of metal on the carbon material is 20%, then ultrasonically stirring for 80 minutes, then centrifugally treating for 5 minutes at 8000r/min, then cleaning for 2-3 times by using an ethanol solution, and finally drying the product in a natural environment to obtain the ten-element platinum-based high-entropy alloy nanowire catalyst.
Although embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention, and that variations, modifications, substitutions and alterations can be made in the above embodiments by those of ordinary skill in the art without departing from the principle and spirit of the present invention.
Claims (9)
1. The platinum-based high-entropy alloy nanowire catalyst is characterized by comprising a carbon carrier and a plurality of platinum-based high-entropy alloy nanowires loaded on the carbon carrier, wherein the plurality of platinum-based high-entropy alloy nanowires contain 5-10 elements, the molar ratio of each element is 5-35%, the platinum-based high-entropy alloy nanowires have a face-centered cubic lattice (FCC) single-phase solid solution structure and one-dimensional morphological characteristics, and the wire diameter is in a sub-nanometer or nanometer size; wherein the 5-10 elements comprise platinum element, molybdenum element, and at least three of iridium element, rhodium element, ruthenium element, nickel element, cobalt element, iron element, manganese element and chromium element.
2. The platinum-based high-entropy alloy nanowire catalyst of claim 1, wherein the multi-element platinum-based high-entropy alloy nanowire is a pentabasic platinum-based high-entropy alloy nanowire, a hexabasic platinum-based high-entropy alloy nanowire, a heptabasic platinum-based high-entropy alloy nanowire, an eight-element platinum-based high-entropy alloy nanowire, a nine-element platinum-based high-entropy alloy nanowire, or a ten-element platinum-based high-entropy alloy nanowire.
3. The platinum-based high-entropy alloy nanowire catalyst as claimed in claim 1 or 2, wherein the length of the multi-element platinum-based high-entropy alloy nanowire is 30-200nm, and the wire diameter is 0.8-1.5 nm.
4. A preparation method for preparing the platinum-based high-entropy alloy nanowire catalyst according to any one of claims 1 to 3, characterized by comprising the steps of:
step one, preparing a metal salt precursor solution, specifically: weighing a certain amount of platinum acetylacetonate, molybdenum hexacarbonyl and other metal salt precursors, dissolving the platinum acetylacetonate, the molybdenum hexacarbonyl and the other metal salt precursors in an oleylamine solvent according to the concentration of 2.5mg/mL, 5mg/mL and 0-2.5mg/mL respectively, and then ultrasonically stirring for a certain time to prepare a turbid and uniform colloidal metal salt precursor solution; wherein the other metal salt precursor is at least three selected from iridium acetylacetonate, rhodium acetylacetonate, ruthenium acetylacetonate, nickel acetylacetonate, cobalt acetylacetonate, iron acetylacetonate, manganese acetylacetonate and chromium acetylacetonate, and the dissolving of the other metal salt precursor in the oleylamine solvent according to the concentration of 0-2.5mg/mL specifically means that each metal salt precursor in the other metal salt precursor is dissolved in the oleylamine solvent according to the concentration of 0-2.5mg/mL respectively;
step two, preparing a surfactant and reducing agent solution, which specifically comprises the following steps: respectively dissolving the surfactant and the reducing agent in an oleylamine solvent according to the concentration of 2.5-15mg/mL, then ultrasonically stirring for a certain time, and uniformly dispersing and mixing to obtain a surfactant and reducing agent solution; wherein the surfactant is quaternary ammonium salt, and the reducing agent is polyhydroxy aldehyde;
step three, preparing the multi-element platinum-based high-entropy alloy nanowire, which specifically comprises the following steps: putting the metal salt precursor solution prepared in the first step into a reaction container, then pouring the surfactant and reducing agent solution prepared in the second step into the metal salt precursor solution in the reaction container, then ultrasonically stirring for a certain time and uniformly mixing to obtain a dispersion liquid, then sealing the reaction container containing the dispersion liquid, transferring the reaction container into an oil bath pot for oil bath heating, keeping the temperature after the dispersion liquid is heated to 200-230 ℃, allowing the dispersion liquid to react for 60-90 minutes at the temperature of 200-230 ℃ to generate a black colloidal solution, then stopping heating, after the reaction container is cooled to room temperature, adding a certain amount of cyclohexane/ethanol mixed solution into the black colloidal solution, then centrifuging for a certain time, then cleaning with the cyclohexane/ethanol mixed solution, obtaining the multi-element platinum-based high-entropy alloy nanowire, and then dispersing the obtained multi-element platinum-based high-entropy alloy nanowire into cyclohexane to prepare a standby liquid;
step four, preparing the platinum-based high-entropy alloy nanowire catalyst, which specifically comprises the following steps: weighing a certain amount of carbon carrier, ultrasonically dispersing the carbon carrier in a cyclohexane/ethanol mixed solution to prepare a carbon dispersion liquid with the concentration of 0.5mg/mL, then pouring the standby liquid prepared in the third step into the carbon dispersion liquid according to the proportion that the mass percent of metal on the carbon material is 20%, ultrasonically stirring for a certain time, then centrifuging for a certain time, then cleaning by using an ethanol solution, and finally drying the product in a natural environment to obtain the platinum-based high-entropy alloy nanowire catalyst.
5. The method according to claim 4, wherein in the third step, the oil bath pan is transferred to a 50-80 ℃ oil bath pan, and the heating time in the oil bath is 5-20 minutes.
6. The production method according to claim 4, wherein the volume ratio of the cyclohexane/ethanol mixed solution in the third step is 1: 3.
7. The method according to claim 4, wherein in the fourth step, the carbon support is a commercial carbon support.
8. The preparation method according to any one of claims 4 to 7, wherein in the first step, the ultrasonic agitation is performed for a certain time of 60 to 80 minutes; and/or in the second step, the ultrasonic stirring is carried out for 30 minutes in a certain time; and/or in the third step, the ultrasonic stirring is carried out for 10-30 minutes in a certain time, and the centrifugal treatment is carried out for 5 minutes in a certain time of 8000-; and/or in the fourth step, the ultrasonic stirring is carried out for 60-90 minutes in a certain time, and the centrifugal treatment is carried out for 5 minutes at 8000 r/min.
9. The production method according to any one of claims 4 to 7, wherein in the third step, the washing with the cyclohexane/ethanol mixed solution is performed 2 to 3 times; and/or in the fourth step, the washing times of the washing with the ethanol solution are 2-3 times.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111473560.5A CN114196981B (en) | 2021-11-29 | 2021-11-29 | Platinum-based high-entropy alloy nanowire catalyst and preparation method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111473560.5A CN114196981B (en) | 2021-11-29 | 2021-11-29 | Platinum-based high-entropy alloy nanowire catalyst and preparation method thereof |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN114196981A true CN114196981A (en) | 2022-03-18 |
| CN114196981B CN114196981B (en) | 2023-01-20 |
Family
ID=80650677
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202111473560.5A Active CN114196981B (en) | 2021-11-29 | 2021-11-29 | Platinum-based high-entropy alloy nanowire catalyst and preparation method thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN114196981B (en) |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114713245A (en) * | 2022-04-08 | 2022-07-08 | 中南大学 | Multi-family multi-element alloy/carbon nano tube catalytic material and preparation method and application thereof |
| CN114917928A (en) * | 2022-04-29 | 2022-08-19 | 华南理工大学 | Star-shaped multifunctional electrocatalytic material of platinum-iron-nickel-copper-ruthenium multi-element alloy solid solution and preparation and application thereof |
| CN115058729A (en) * | 2022-07-08 | 2022-09-16 | 山东非金属材料研究所 | Iridium-based high-entropy alloy nano catalyst for oxygen precipitation reaction and preparation method thereof |
| CN115101764A (en) * | 2022-05-10 | 2022-09-23 | 大连理工大学 | Green low-temperature preparation method and electrocatalysis application of supported high-entropy alloy material |
| CN115188978A (en) * | 2022-08-05 | 2022-10-14 | 中国科学技术大学 | Preparation method and application of supported polycrystalline surface defect high-entropy alloy catalyst |
| CN115261921A (en) * | 2022-07-20 | 2022-11-01 | 昆明理工大学 | FeCoNiMnCr high-entropy alloy/high-entropy oxide heterogeneous phase catalyst and preparation method and application thereof |
| CN115692747A (en) * | 2023-01-04 | 2023-02-03 | 北京中农普康生物科技有限公司 | Sugarcoated haw-shaped high-entropy alloy nanowire catalyst and preparation method thereof |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113042744A (en) * | 2021-03-11 | 2021-06-29 | 北京大学 | High-entropy alloy nanobelt and preparation method thereof |
| CN113318733A (en) * | 2021-05-28 | 2021-08-31 | 清华大学 | Preparation method and application of high-entropy nanoenzyme |
-
2021
- 2021-11-29 CN CN202111473560.5A patent/CN114196981B/en active Active
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113042744A (en) * | 2021-03-11 | 2021-06-29 | 北京大学 | High-entropy alloy nanobelt and preparation method thereof |
| CN113318733A (en) * | 2021-05-28 | 2021-08-31 | 清华大学 | Preparation method and application of high-entropy nanoenzyme |
Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114713245A (en) * | 2022-04-08 | 2022-07-08 | 中南大学 | Multi-family multi-element alloy/carbon nano tube catalytic material and preparation method and application thereof |
| CN114917928A (en) * | 2022-04-29 | 2022-08-19 | 华南理工大学 | Star-shaped multifunctional electrocatalytic material of platinum-iron-nickel-copper-ruthenium multi-element alloy solid solution and preparation and application thereof |
| CN114917928B (en) * | 2022-04-29 | 2023-08-22 | 华南理工大学 | Star-shaped platinum-iron-nickel-copper-ruthenium multi-element alloy solid solution multifunctional electrocatalytic material and preparation and application thereof |
| CN115101764A (en) * | 2022-05-10 | 2022-09-23 | 大连理工大学 | Green low-temperature preparation method and electrocatalysis application of supported high-entropy alloy material |
| CN115058729A (en) * | 2022-07-08 | 2022-09-16 | 山东非金属材料研究所 | Iridium-based high-entropy alloy nano catalyst for oxygen precipitation reaction and preparation method thereof |
| CN115058729B (en) * | 2022-07-08 | 2023-11-28 | 山东非金属材料研究所 | Iridium-based high-entropy alloy nano-catalyst for oxygen precipitation reaction and preparation method thereof |
| CN115261921A (en) * | 2022-07-20 | 2022-11-01 | 昆明理工大学 | FeCoNiMnCr high-entropy alloy/high-entropy oxide heterogeneous phase catalyst and preparation method and application thereof |
| CN115188978A (en) * | 2022-08-05 | 2022-10-14 | 中国科学技术大学 | Preparation method and application of supported polycrystalline surface defect high-entropy alloy catalyst |
| CN115692747A (en) * | 2023-01-04 | 2023-02-03 | 北京中农普康生物科技有限公司 | Sugarcoated haw-shaped high-entropy alloy nanowire catalyst and preparation method thereof |
| CN115692747B (en) * | 2023-01-04 | 2023-04-28 | 北京中农普康生物科技有限公司 | Sugar-gourd-shaped high-entropy alloy nanowire catalyst and preparation method thereof |
Also Published As
| Publication number | Publication date |
|---|---|
| CN114196981B (en) | 2023-01-20 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN114196981B (en) | Platinum-based high-entropy alloy nanowire catalyst and preparation method thereof | |
| Nan et al. | Engineering the electronic and strained interface for high activity of PdMcore@ Ptmonolayer electrocatalysts for oxygen reduction reaction | |
| Han et al. | Metallic ruthenium-based nanomaterials for electrocatalytic and photocatalytic hydrogen evolution | |
| Zhang et al. | Zinc-blende CdS nanocubes with coordinated facets for photocatalytic water splitting | |
| Raghuveer et al. | Comparison of Pd–Co–Au electrocatalysts prepared by conventional borohydride and microemulsion methods for oxygen reduction in fuel cells | |
| CN108435201B (en) | Synthetic method of multi-branched Pd @ PtNi core-shell nano-catalyst | |
| CN111686758A (en) | RuFeCoNiCu high-entropy alloy nanoparticle catalyst and preparation method and application thereof | |
| CN108080005B (en) | Preparation method of 1T' phase tungsten sulfide of high-catalytic-activity electrocatalyst | |
| Tang et al. | Colloidal nanocrystals for electrochemical reduction reactions | |
| Ding et al. | Ultrathin defective nanosheet subunit ZnIn2S4 hollow nanoflowers for efficient photocatalytic hydrogen evolution | |
| CN114700096A (en) | Mo @ Mo2Synthesis method of C nano composite material | |
| CN109599570B (en) | Dendritic PdPt nano-particles for electrocatalytic methanol oxidation and preparation method thereof | |
| CN104307535A (en) | Preparation method of amorphous nano-oxide-precious metal heterostructure catalyst | |
| CN104624191A (en) | CoO/C catalyst and preparation method thereof | |
| CN114182290B (en) | Noble metal-two-dimensional transition metal chalcogenide heterostructure, preparation method and application thereof | |
| CN113976120B (en) | Preparation method of high-activity CoB catalyst | |
| CN115094437A (en) | Preparation method of nitrogen-doped two-dimensional carbon-based molybdenum carbide nano material | |
| Ashok et al. | Colloidal metal oxide nanocrystals in catalysis | |
| CN115207372A (en) | Platinum-based intermetallic compound catalyst, preparation method thereof and fuel cell membrane electrode | |
| KR20210143673A (en) | Quantum dot comprising molybdenum, nickel and sulfur and manufacturing method thereof | |
| CN105789638A (en) | Method for preparing amorphous Ni-B/CDs catalyst with carbon quantum dots serving as seed crystals | |
| CN111864218A (en) | Universal liquid phase preparation method of noble metal-based intermetallic compound | |
| CN116422342B (en) | Multi-atom doped surface platinum-rich catalyst and preparation method thereof | |
| CN117428201A (en) | Multicomponent superfine Pt-based nanowire material and preparation method thereof | |
| CN113753954B (en) | MoS 2 /Ag 2 S hybridized nano material, preparation method and application |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |