CN114300694A - Liquid phase preparation method of platinum-based fuel cell catalyst and electrocatalysis application thereof - Google Patents
Liquid phase preparation method of platinum-based fuel cell catalyst and electrocatalysis application thereof Download PDFInfo
- Publication number
- CN114300694A CN114300694A CN202111653480.8A CN202111653480A CN114300694A CN 114300694 A CN114300694 A CN 114300694A CN 202111653480 A CN202111653480 A CN 202111653480A CN 114300694 A CN114300694 A CN 114300694A
- Authority
- CN
- China
- Prior art keywords
- platinum
- catalyst
- fuel cell
- cobalt
- phase preparation
- 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.)
- Pending
Links
Images
Classifications
-
- 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
- Inert Electrodes (AREA)
- Catalysts (AREA)
Abstract
A liquid phase preparation method of a platinum-based fuel cell catalyst and an electro-catalysis application thereof relate to a nano material and a fuel cell catalyst. Adding a platinum precursor, a cobalt precursor and a catalyst carrier into a reaction container filled with an alcohol solvent, and carrying out ultrasonic homogenization in an ultrasonic instrument; adding a formaldehyde aqueous solution; sealing the reaction vessel, and starting magnetic stirring reaction; washing with a washing solution, centrifugally separating and drying; and calcining the dried product in an air atmosphere, and cooling to obtain the catalyst. The catalyst comprises platinum-cobalt nanoparticles and a catalyst carrier, wherein the platinum-cobalt nanoparticles are loaded on the catalyst carrier. The catalyst can be applied to oxygen reduction reaction of a fuel cell and a membrane electrode of a fuel cell device. The catalyst has uniform size and uniform dispersion; the process is simple and efficient; by changing reaction conditions, a plurality of platinum-based alloy catalysts with different components and sizes can be synthesized; the catalyst exhibits excellent electrocatalytic performance on both the rotating disk electrode and the fuel cell membrane electrode.
Description
Technical Field
The invention relates to the field of nano materials and fuel cell catalysts, in particular to a liquid phase preparation method of a platinum-based fuel cell catalyst and an electro-catalysis application thereof in an oxygen reduction reaction and a fuel cell membrane electrode.
Background
The platinum-based nano material has the inherent properties of the nano material and the special properties of platinum, has unique physical and chemical properties, is excellent in a plurality of fields, particularly in the field of catalysis, and becomes the most efficient fuel cell catalyst at present.
The platinum-based nano-catalyst shows good catalytic performance in both oxygen reduction reaction and hydrogen oxidation reaction. In the currently published academic papers, platinum-based nanomaterials with different components and structures show relatively excellent performance in electrochemical tests, but the catalytic performance of most materials on the membrane electrode of the fuel cell is not ideal. This is because surfactants and protective agents which are difficult to remove are generally used in these synthesis methods, which causes problems such as unclean catalyst surface and difficulty in completely exposing the catalytic active sites. Many studies have shown that in order to control the formation of platinum-based nanomaterials with various morphologies, surfactants and protective agents such as polyvinylpyrrolidone (PVP) or oleylamine are commonly used. In the catalytic reaction, long-time electrochemical activation is usually required to clean the surface of the catalyst so as to show considerable catalytic performance; on the proton exchange membrane in the fuel cell device, the quality of the membrane is reduced due to the overlong activation number of the catalyst, and the catalyst is difficult to show due catalytic performance when the activation number is less. Therefore, there is a need to control the synthesis of clean-surface platinum-based fuel cell catalysts, which is critical to improving their catalytic performance.
Typically, one improves catalyst performance by strategies that alloy or intermetallic compounds platinum with non-noble metals, such as synthesizing platinum-nickel alloys, platinum-cobalt alloys, platinum-lead intermetallic compounds, and the like; the content of non-noble metals is usually relatively high. In the actual proton exchange membrane fuel cell, the phenomenon of base metal dissolution is easily caused when the content of non-noble metal is higher, so that the proton exchange membrane is damaged; in the design of a platinum-based fuel cell catalyst, a high platinum ratio needs to be ensured as much as possible to realize good catalytic performance. In addition, most basic researches do not consider the yield of the synthetic method and the feasibility problem of mass production, and the requirements of simplicity, high yield and the like of the synthetic method need to be met in the actual production, so that the high efficiency and the feasibility of the actual production can be ensured. Therefore, designing a catalyst for an actual fuel cell device requires comprehensive consideration of the components and structure of the catalyst, the yield of the preparation method, and the process and flow of batch preparation.
Currently, the known institutions engaged in the research of fuel cell catalysts abroad are Johnson Matthey, Japan K TKK, and the like, and the carbon-supported platinum and platinum alloys produced by the institutions are used as the industrial standard for fuel cell products. The fuel cell catalyst produced by domestic research and development institutions has obvious gap with foreign fuel cell catalysts; therefore, under the research background, the development of a high-performance platinum-based fuel cell catalyst which is uniform in size, uniform in dispersion, simple and efficient in preparation process and capable of being produced in batch has very important value and significance.
Disclosure of Invention
The invention aims to provide a liquid phase preparation method of a platinum-based fuel cell catalyst and an electro-catalysis application thereof, which have the advantages of uniform size, uniform dispersion, simple and efficient preparation process and batch production, aiming at the defects in the prior art.
The liquid phase preparation method of the platinum-based fuel cell catalyst comprises the following steps:
s1, adding a platinum precursor, a cobalt precursor and a catalyst carrier into a reaction container filled with an alcohol solvent;
s2, ultrasonically homogenizing the mixture in an ultrasonic instrument;
s3, adding a formaldehyde aqueous solution into the solution subjected to the ultrasonic treatment in the step S2;
s4, sealing the reaction container, starting magnetic stirring, and reacting;
s5, washing with a washing solution, centrifuging and drying;
and S6, calcining the dried product in an air atmosphere at a certain temperature, and cooling to obtain the final carbon-supported platinum-cobalt nano catalyst, namely the platinum-based fuel cell catalyst.
In step S1, the alcohol solvent may be selected from ethylene glycol, diethylene glycol, triethylene glycol, etc.; the platinum precursor can be tetraammonium platinum nitrate and platinum acetylacetonate, and the cobalt precursor can be cobalt acetate, cobalt formate, cobalt chloride, cobalt nitrate and the like; the mol ratio of the platinum precursor to the cobalt precursor can be 1: 0-1: 1, and the concentration of the platinum precursor can be 1-40 mmol/L; the concentration of the catalyst carrier can be adjusted according to the requirement, the adjustment range is 0.1-50 g/L, and the catalyst carrier can be Vulcan XC-72R type carbon powder, carbon nano tubes and the like.
In step S2, the ultrasonic treatment time may be 10-720 min.
In step S3, the formaldehyde solution may be replaced by a formic acid solution or sodium formate as a reducing agent, and the addition amount of the formaldehyde solution may be 1 to 10000 mmol/L.
In step S4, the reaction temperature is 120-200 ℃ and the reaction time is 0.5-24 h.
In step S5, the washing solution can be acetic acid solution with concentration of 0-3 mol/L, and the centrifugation times can be 2-5 times; the drying temperature can be 50-90 ℃, and the drying time can be 0.5-6 h.
In step S6, the catalyst needs to be semi-enclosed during calcination, i.e. the calcination vessel is covered and placed; the calcining temperature can be 200-250 ℃, the calcining time can be 5-240 min, and the calcining atmosphere is air.
The invention also provides a catalyst prepared by the liquid-phase preparation method of the platinum-based fuel cell catalyst. The catalyst comprises platinum-cobalt nanoparticles and a catalyst carrier, wherein the platinum-cobalt nanoparticles are loaded on the catalyst carrier.
The catalyst can be applied to oxygen reduction reaction of a fuel cell and a membrane electrode of a fuel cell device.
Compared with the existing catalyst preparation method, the preparation method used by the invention has the following advantages:
1. by adopting a liquid phase preparation method, at least 10 g of catalyst can be produced in each liter of solvent, and the method has the potential of mass production;
2. the method adopts a high-temperature reduction way, the utilization rate of the noble metal is high, and the catalyst is uniform in size and uniform in dispersion;
3. the synthesis process adopted by the method is simple and efficient, and the practical fuel cell catalyst with a clean surface can be obtained only by five steps of ultrasound, reduction, washing, drying and calcination, so that the method has great application potential;
4. the method has wider application range, and can synthesize a plurality of platinum-based alloy catalysts with different components and sizes by changing reaction conditions;
5. the synthesis process adopted by the method is relatively stable, and the prepared platinum-based nano-catalyst has excellent performance.
Drawings
FIG. 1 is a high-resolution TEM image and elemental distribution diagram of Pt-Co nanocatalyst in example 1 of the present invention;
FIG. 2 is a polycrystalline X-ray diffraction pattern of different platinum-cobalt nanocatalysts in examples 1-5 of the present invention;
FIG. 3 is a transmission electron microscope image of different platinum-cobalt nano-catalysts in examples 1 to 5 of the present invention;
FIG. 4 is a Cyclic Voltammogram (CV) and a Linear Scanning Voltammogram (LSV) measured on a rotating disk electrode by using different platinum-cobalt nano-catalysts in examples 1 to 5 of the present invention;
FIG. 5 is a bar graph of mass activity of different platinum-cobalt nanocatalysts in examples 1-5 of the present invention;
fig. 6 is a polarization curve diagram of the platinum-cobalt nano-catalyst on the membrane electrode of the fuel cell in example 1 of the present invention.
Detailed Description
The technical solution in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. It is to be understood that the described embodiments are merely exemplary of the invention, and not restrictive of the full scope of the invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Example 1
In order to make the objects, technical solutions and advantages of the present invention more apparent, the following embodiments will be further described with reference to the accompanying drawings. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention. On the contrary, the invention is intended to cover alternatives, modifications, equivalents and alternatives which may be included within the spirit and scope of the invention as defined by the appended claims. Furthermore, in the following detailed description of the present invention, certain specific details are set forth in order to provide a better understanding of the present invention. It will be apparent to one skilled in the art that the present invention may be practiced without these specific details.
The embodiment of the invention provides a preparation method of a platinum-based fuel cell catalyst, which comprises the following steps:
s1, weighing 1000mg of platinum acetylacetonate, 91mg of cobalt acetate and 500mg of Vulcan XC-72R type carbon powder, placing the weighed materials in a reaction bottle, and adding 100mL of ethylene glycol into the reaction bottle.
S2, placing the reaction bottle filled with the mixture into an ultrasonic instrument, and ultrasonically dispersing until the mixture is uniform.
S3, adding 1.5mL of 40% formaldehyde aqueous solution into the solution after ultrasonic treatment.
In the above system, the alcohol solvent can serve as both a solvent and a reducing agent. By utilizing the reducibility of alcohols, the metal precursor (acetylacetone compound) is thermally decomposed at high temperature, and the carbon-supported platinum-cobalt nano catalyst with uniform size, uniform distribution and adjustable components can be prepared. The alcohol solvent can be selected in various ways according to the reducibility and boiling point of different alcohol solvents, and the most suitable is dihydric alcohol. In this example, ethylene glycol was used as a solvent, and in example 3, triethylene glycol was used as a solvent.
Ethylene glycol is also known as ethylene glycol, 1, 2-ethylene glycol, and abbreviated as EG. Has a chemical formula of (CH)2OH)2Is the simplest diol. Ethylene glycol is a colorless, odorless, sweet liquid with low toxicity to animals. Ethylene glycol can be reacted withWater and acetone are mutually soluble, but the solubility in ethers is lower. The molecular weight is 62.068, the melting point is-12.9 ℃ and the boiling point is 197.3 ℃.
The platinum acetylacetonate is yellow solid powder, is stable at normal temperature and normal pressure, is melted and decomposed at the temperature of 249-252 ℃, and has the molecular weight of 393.30.
Cobalt acetate, also known as cobalt acetate, of formula C4H6CoO4Molecular weight 177.02, and is soluble in water, ethanol, dilute acid, amyl acetate, etc.
Formaldehyde is a colorless, strongly pungent odor gas that is readily soluble in water, alcohols, and ethers. Formaldehyde is gaseous at ambient temperature, usually in the form of an aqueous solution, and has a molecular weight of 30.03. It has the functions of increasing reducibility and reducing particle size in the preparation process.
S4, adding magnetons into the ultrasonically uniform solution, sealing, heating to 200 ℃ in the stirring process, and reacting for 10 hours at the constant temperature of 200 ℃.
S5, washing and centrifuging 3 times by using 1mol/L acetic acid solution after reaction. When a small amount of acetic acid solution is used, the product after reaction has good dispersibility and is difficult to centrifuge down, so 3mL of ammonia water can be added into the acetic acid solution during the first centrifugation, the mixture is centrifuged, dried in an oven at 90 ℃ for 2h, and then the catalyst is taken out and ground into fine powder.
S6, placing the catalyst powder in a porcelain boat, wrapping the porcelain boat with tinfoil, and calcining the porcelain boat in an oven at 250 ℃ for 2h to obtain the final platinum-cobalt nano catalyst which is marked as a sample of example 1.
As shown in fig. 1, the synthesized platinum-cobalt nanoparticles are small and uniform in size, and it can be seen from the element distribution diagram that the platinum and cobalt elements in the platinum-cobalt nanoparticles are uniformly distributed.
Example 2
The sample obtained by replacing platinum acetylacetonate with an equimolar amount of tetraammonium platinum nitrate based on example 1 was designated as example 2.
Example 3
The sample obtained by replacing ethylene glycol with triethylene glycol on the basis of example 1 and raising the reaction temperature to 260 ℃ was designated as example 3.
Example 4
The amount of carbon powder was increased to 1500mg on the basis of example 1, and the obtained sample was designated as example 4.
Example 5
The reducing agent was replaced with 1.5mL of 88% formic acid solution based on example 1, and the resulting sample was designated as example 5.
FIG. 2 is a graph of membrane electrode performance in a PEM fuel cell for the sample of example 1. As shown in the figure, the power density is 0.91W/cm2@ 0.6V. The corresponding test conditions were: the pressure of hydrogen gas in the hydrogen-air fuel cell is 100kPa, the test temperature is 80 ℃, and the test area is 25cm2Relative humidity of 100% and platinum amount of 0.3mg/cm2。
FIG. 3 is a transmission electron microscope photograph of five catalysts of examples 1 to 5. As can be seen from the figure, the synthesized nanoparticles are uniformly dispersed on the carbon powder, and the size is uniform. The diameter of the nanoparticles of the sample in example 1 is mostly distributed between 2.6 nm and 4.5 nm; the diameter of the nanoparticles of the sample in example 2 is mostly distributed between 2.7 nm and 4.6 nm; the diameter of the nanoparticles of the sample in example 3 is mostly distributed between 2.4 nm and 7.7 nm; the diameter of the nanoparticles of the sample in example 4 is mostly distributed between 2.3 nm and 4.3 nm; the diameter of the nanoparticles of the sample of example 5 is mostly distributed between 2.3 nm and 4.7 nm.
FIG. 4 is a plot of Cyclic Voltammograms (CV) and corresponding Linear Sweep Voltammograms (LSV) for five catalysts on an electrochemical workstation, and FIGS. 5A-5E correspond to the catalyst samples of examples 1-5, respectively. The electrochemical active surface areas (ECSA) of the five catalysts can be calculated from the CV map, and the oxygen reduction catalytic activities of the five catalysts can be calculated from the LSV map. CV curve test conditions were as follows: is 0.1M HClO in the electrolyte4In the solution, the potential interval is 0.053-1.263V (vs. RHE), and the scanning speed is 0.05V/s. In the test, 10 potential cycles are firstly activated at the scanning speed of 0.2V/s, and then CV curves are collected at the scanning speed of 0.05V/s. LSV diagram is 0.1M HClO at saturated oxygen4In solution, a rotating disk electrode with the rotating speed of 1600rpm is used, and the potential is 0 toRHE interval of 1.1V (vs. RHE), obtained with a sweep rate of 0.05V/s.
FIG. 5 shows the mass activities of five catalysts normalized to the mass of platinum element, and the mass activities of examples 1 to 5 were 0.197, 0.137, 0.12, 0.227, and 0.154A/mgPt -1. Of these, the sample of example 4 had the highest mass activity, followed by the sample of example 1, and the ECSA of the sample of example 1 was the highest as shown in fig. 5.
FIG. 6 is a polycrystalline X-ray diffraction pattern of the samples of examples 1-5, with the standard card below being a platinum face-centered cubic phase card (JCPDS No. 04-0802). From the diffraction peak of the (111) crystal face of about 40 degrees, the X-ray diffraction peaks of the five catalysts are shifted to the right, which shows that the corresponding platinum-cobalt alloy is formed. Due to different synthesis conditions, the half-peak widths of the diffraction peaks are different, the larger the particle size is, the smaller the half-peak width is, and the sharper the diffraction peaks are, which is also demonstrated by combining fig. 6 and fig. 3.
TABLE 1
Table 1 shows scanning electron microscope-X-ray energy distribution spectra (SEM-EDS) of different platinum-cobalt nanocatalysts in examples 1-5 of the present invention. The platinum-cobalt catalyst prepared by the method shows excellent electrocatalysis performance on a rotating disk electrode and a fuel cell membrane electrode, and has wide application prospect.
Claims (10)
1. A liquid phase preparation method of a platinum-based fuel cell catalyst is characterized by comprising the following steps:
s1, adding a platinum precursor, a cobalt precursor and a catalyst carrier into a reaction container filled with an alcohol solvent;
s2, ultrasonically homogenizing the mixture in an ultrasonic instrument;
s3, adding a formaldehyde aqueous solution into the solution subjected to the ultrasonic treatment in the step S2;
s4, sealing the reaction container, starting magnetic stirring, and reacting;
s5, washing with a washing solution, centrifuging and drying;
and S6, calcining the dried product in an air atmosphere at a certain temperature, and cooling to obtain the final catalyst.
2. The liquid-phase preparation method of a platinum-based fuel cell catalyst according to claim 1, wherein in step S1, said alcohol solvent is selected from the group consisting of ethylene glycol, diethylene glycol, and triethylene glycol.
3. The liquid-phase preparation method of a platinum-based fuel cell catalyst according to claim 1, wherein in step S1, the platinum precursor is tetraammonium platinum nitrate or platinum acetylacetonate, and the cobalt precursor is cobalt acetate, cobalt formate, cobalt chloride or cobalt nitrate; the mol ratio of the platinum precursor to the cobalt precursor can be 1: 0-1: 1, and the concentration of the platinum precursor can be 1-40 mmol/L; the concentration of the catalyst carrier can be adjusted according to the requirement, the adjustment range is 0.1-50 g/L, and the catalyst carrier can be Vulcan XC-72R type carbon powder and carbon nano tubes.
4. The liquid phase preparation method of a platinum-based fuel cell catalyst according to claim 1, wherein in step S2, the ultrasonic time is 10 to 720 min.
5. The method of claim 1, wherein in step S3, the formaldehyde solution is replaced by a formic acid solution or sodium formate, and the amount of the formaldehyde solution added is 1 to 10000 mmol/L.
6. The liquid phase preparation method of a platinum-based fuel cell catalyst according to claim 1, wherein in step S4, the reaction temperature is 120 to 200 ℃ and the reaction time is 0.5 to 24 hours.
7. The liquid-phase preparation method of a platinum-based fuel cell catalyst according to claim 1, wherein in step S5, the washing solution is an acetic acid solution with a concentration of 0 to 3mol/L, and the number of centrifugation is 2 to 5; the drying temperature can be 50-90 ℃, and the drying time can be 0.5-6 h.
8. The liquid-phase preparation method of a platinum-based fuel cell catalyst according to claim 1, wherein in step S6, the catalyst is semi-enclosed during calcination, i.e., the calcination vessel is covered; the calcining temperature can be 200-250 ℃, the calcining time can be 5-240 min, and the calcining atmosphere is air.
9. A catalyst prepared by the liquid-phase preparation method of a platinum-based fuel cell catalyst according to any one of claims 1 to 8; the catalyst comprises platinum-cobalt nanoparticles and a catalyst carrier, wherein the platinum-cobalt nanoparticles are loaded on the catalyst carrier.
10. The use of the catalyst of claim 9 in oxygen reduction reactions in fuel cells and fuel cell device membrane electrodes.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111653480.8A CN114300694A (en) | 2021-12-30 | 2021-12-30 | Liquid phase preparation method of platinum-based fuel cell catalyst and electrocatalysis application thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111653480.8A CN114300694A (en) | 2021-12-30 | 2021-12-30 | Liquid phase preparation method of platinum-based fuel cell catalyst and electrocatalysis application thereof |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN114300694A true CN114300694A (en) | 2022-04-08 |
Family
ID=80973662
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202111653480.8A Pending CN114300694A (en) | 2021-12-30 | 2021-12-30 | Liquid phase preparation method of platinum-based fuel cell catalyst and electrocatalysis application thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN114300694A (en) |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101890347A (en) * | 2009-05-19 | 2010-11-24 | 中国科学院理化技术研究所 | Method for preparing proton exchange membrane fuel cell supported catalyst |
| CN102218331A (en) * | 2011-04-26 | 2011-10-19 | 哈尔滨师范大学 | Preparation method of carbon-supported Pt-based nanometer catalyst |
| CN109860642A (en) * | 2019-02-03 | 2019-06-07 | 复旦大学 | A kind of carbon-supported nano Pt-Co alloy catalyst and its preparation method and application |
| US20190341624A1 (en) * | 2018-05-02 | 2019-11-07 | Korea Institute Of Science And Technology | Method for preparing carbon-supported platinum-transition metal alloy nanoparticle catalyst |
| US20200106107A1 (en) * | 2018-10-01 | 2020-04-02 | Florida State University Research Foundation, Inc. | Method for making ultralow platinum loading and high durability membrane electrode assembly for polymer electrolyte membrane fuel cells |
| CN111659390A (en) * | 2020-05-21 | 2020-09-15 | 中国原子能科学研究院 | Platinum-based catalyst containing promethium or compound thereof |
| CN113161563A (en) * | 2021-04-28 | 2021-07-23 | 郑州中科新兴产业技术研究院 | Platinum-cobalt alloy catalyst for fuel cell and preparation method thereof |
-
2021
- 2021-12-30 CN CN202111653480.8A patent/CN114300694A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101890347A (en) * | 2009-05-19 | 2010-11-24 | 中国科学院理化技术研究所 | Method for preparing proton exchange membrane fuel cell supported catalyst |
| CN102218331A (en) * | 2011-04-26 | 2011-10-19 | 哈尔滨师范大学 | Preparation method of carbon-supported Pt-based nanometer catalyst |
| US20190341624A1 (en) * | 2018-05-02 | 2019-11-07 | Korea Institute Of Science And Technology | Method for preparing carbon-supported platinum-transition metal alloy nanoparticle catalyst |
| US20200106107A1 (en) * | 2018-10-01 | 2020-04-02 | Florida State University Research Foundation, Inc. | Method for making ultralow platinum loading and high durability membrane electrode assembly for polymer electrolyte membrane fuel cells |
| CN109860642A (en) * | 2019-02-03 | 2019-06-07 | 复旦大学 | A kind of carbon-supported nano Pt-Co alloy catalyst and its preparation method and application |
| CN111659390A (en) * | 2020-05-21 | 2020-09-15 | 中国原子能科学研究院 | Platinum-based catalyst containing promethium or compound thereof |
| CN113161563A (en) * | 2021-04-28 | 2021-07-23 | 郑州中科新兴产业技术研究院 | Platinum-cobalt alloy catalyst for fuel cell and preparation method thereof |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| Wang et al. | Novel flower-like PdAu (Cu) anchoring on a 3D rGO-CNT sandwich-stacked framework for highly efficient methanol and ethanol electro-oxidation | |
| Cai et al. | Bi-modified Pd/C catalyst via irreversible adsorption and its catalytic activity for ethanol oxidation in alkaline medium | |
| Li et al. | Rapid room-temperature synthesis of Pd nanodendrites on reduced graphene oxide for catalytic oxidation of ethylene glycol and glycerol | |
| EP3027308B1 (en) | Method for forming noble metal nanoparticles on a support | |
| CN100511789C (en) | Anode catalyst of high active PtNi base proton exchange film fuel cell | |
| CN101656313B (en) | Preparation method of catalyst for cathode of direct methanol fuel cell | |
| Yahya et al. | Durability and performance of direct glycerol fuel cell with palladium-aurum/vapor grown carbon nanofiber support | |
| Li et al. | Platinum–silver alloyed octahedral nanocrystals as electrocatalyst for methanol oxidation reaction | |
| KR100868756B1 (en) | Pt/Ru alloy supported catalyst, manufacturing method thereof, and fuel cell using the same | |
| Yang et al. | Surfactant-assisted synthesis of palladium nanosheets and nanochains for the electrooxidation of ethanol | |
| Wang et al. | Ultrathin PtMo-CeOx hybrid nanowire assemblies as high-performance multifunctional catalysts for methanol oxidation, oxygen reduction and hydrogen oxidation | |
| US20220126275A1 (en) | Low-cost and low-platinum composite catalyst for low-temperature proton exchange membrane fuel cells | |
| CN112968185B (en) | Preparation method of plant polyphenol modified manganese-based nano composite electrocatalyst with supermolecular network framework structure | |
| Carvalho et al. | Palladium-platinum electrocatalysts for the ethanol oxidation reaction: comparison of electrochemical activities in acid and alkaline media | |
| Chai et al. | Facile aqueous phase synthesis of Pd3Cu–B/C catalyst for enhanced glucose electrooxidation | |
| Afzali et al. | Design of PdxIr/g-C3N4 modified FTO to facilitate electricity generation and hydrogen evolution in alkaline media | |
| Yang et al. | Designed formation of hollow Pt nanocrystals supported on MoO x-modified carbon for high-performance methanol electro-oxidation | |
| Lee et al. | Electrocatalytic activity and durability study of carbon supported Pt nanodendrites in polymer electrolyte membrane fuel cells | |
| Wang et al. | Facile one-pot synthesis of a PtRh alloy decorated on Ag nanocubes as a trimetallic core–shell catalyst for boosting methanol oxidation reaction | |
| Jiang et al. | Pt-Ni alloy catalyst supported on carbon aerogel via one-step method for oxygen reduction reaction | |
| Tang et al. | A facile synthesis of Pd/C cathode electrocatalyst for proton exchange membrane fuel cells | |
| Wang et al. | A facile strategy synthesized PtRhNi truncated triangle nanoflakes with PtRh-rich surface as highly active and stable bifunctional catalysts for direct methanol fuel cells | |
| Chai et al. | Heterogeneous Ir3Sn–CeO2/C as alternative Pt-free electrocatalysts for ethanol oxidation in acidic media | |
| CN103706375A (en) | Preparation method of PtFe/C catalyst used for proton exchange membrane fuel cell | |
| Mathe et al. | Microwave-irradiation polyol synthesis of PVP-protected Pt–Ni electrocatalysts for methanol oxidation reaction |
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 |