CN113481537A - Nickel-based compound @ MoS2Preparation and application of core-shell nano material - Google Patents
Nickel-based compound @ MoS2Preparation and application of core-shell nano material Download PDFInfo
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- CN113481537A CN113481537A CN202110846981.1A CN202110846981A CN113481537A CN 113481537 A CN113481537 A CN 113481537A CN 202110846981 A CN202110846981 A CN 202110846981A CN 113481537 A CN113481537 A CN 113481537A
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- PXHVJJICTQNCMI-UHFFFAOYSA-N Nickel Chemical compound [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 title claims abstract description 75
- 229910052759 nickel Inorganic materials 0.000 title claims abstract description 31
- 239000011258 core-shell material Substances 0.000 title claims abstract description 23
- 239000002086 nanomaterial Substances 0.000 title claims abstract description 23
- 229910052961 molybdenite Inorganic materials 0.000 claims abstract description 21
- 229910052982 molybdenum disulfide Inorganic materials 0.000 claims abstract description 21
- 229910052739 hydrogen Inorganic materials 0.000 claims abstract description 18
- 239000001257 hydrogen Substances 0.000 claims abstract description 18
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 claims abstract description 17
- 238000006243 chemical reaction Methods 0.000 claims abstract description 13
- 238000002360 preparation method Methods 0.000 claims abstract description 8
- 238000000034 method Methods 0.000 claims abstract description 7
- 238000001027 hydrothermal synthesis Methods 0.000 claims abstract description 5
- YUKQRDCYNOVPGJ-UHFFFAOYSA-N thioacetamide Chemical compound CC(N)=S YUKQRDCYNOVPGJ-UHFFFAOYSA-N 0.000 claims abstract description 5
- BUGBHKTXTAQXES-UHFFFAOYSA-N Selenium Chemical compound [Se] BUGBHKTXTAQXES-UHFFFAOYSA-N 0.000 claims abstract description 4
- 230000003197 catalytic effect Effects 0.000 claims abstract description 4
- DLFVBJFMPXGRIB-UHFFFAOYSA-N thioacetamide Natural products CC(N)=O DLFVBJFMPXGRIB-UHFFFAOYSA-N 0.000 claims abstract description 4
- 238000004519 manufacturing process Methods 0.000 claims abstract 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Chemical compound O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 20
- 239000008367 deionised water Substances 0.000 claims description 17
- 229910021641 deionized water Inorganic materials 0.000 claims description 17
- 238000001035 drying Methods 0.000 claims description 17
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 claims description 10
- 239000003054 catalyst Substances 0.000 claims description 10
- -1 polytetrafluoroethylene Polymers 0.000 claims description 9
- 239000011669 selenium Substances 0.000 claims description 9
- 239000006260 foam Substances 0.000 claims description 7
- CSCPPACGZOOCGX-UHFFFAOYSA-N Acetone Chemical compound CC(C)=O CSCPPACGZOOCGX-UHFFFAOYSA-N 0.000 claims description 6
- KWYUFKZDYYNOTN-UHFFFAOYSA-M Potassium hydroxide Chemical compound [OH-].[K+] KWYUFKZDYYNOTN-UHFFFAOYSA-M 0.000 claims description 6
- 239000008151 electrolyte solution Substances 0.000 claims description 6
- 229920001343 polytetrafluoroethylene Polymers 0.000 claims description 6
- 239000004810 polytetrafluoroethylene Substances 0.000 claims description 6
- 238000004321 preservation Methods 0.000 claims description 6
- 238000007789 sealing Methods 0.000 claims description 6
- 238000003756 stirring Methods 0.000 claims description 6
- 238000007664 blowing Methods 0.000 claims description 5
- PIICEJLVQHRZGT-UHFFFAOYSA-N Ethylenediamine Chemical compound NCCN PIICEJLVQHRZGT-UHFFFAOYSA-N 0.000 claims description 3
- 238000005520 cutting process Methods 0.000 claims description 3
- 238000000354 decomposition reaction Methods 0.000 claims description 3
- 238000005485 electric heating Methods 0.000 claims description 3
- 239000000203 mixture Substances 0.000 claims description 3
- 238000009210 therapy by ultrasound Methods 0.000 claims description 3
- 238000005406 washing Methods 0.000 claims description 3
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims description 2
- 239000007864 aqueous solution Substances 0.000 claims description 2
- 229910052799 carbon Inorganic materials 0.000 claims description 2
- ZOMNIUBKTOKEHS-UHFFFAOYSA-L dimercury dichloride Chemical class Cl[Hg][Hg]Cl ZOMNIUBKTOKEHS-UHFFFAOYSA-L 0.000 claims description 2
- 239000000758 substrate Substances 0.000 claims 2
- 239000002135 nanosheet Substances 0.000 claims 1
- YGHCWPXPAHSSNA-UHFFFAOYSA-N nickel subsulfide Chemical compound [Ni].[Ni]=S.[Ni]=S YGHCWPXPAHSSNA-UHFFFAOYSA-N 0.000 claims 1
- 239000002356 single layer Substances 0.000 claims 1
- 239000002344 surface layer Substances 0.000 claims 1
- 239000010411 electrocatalyst Substances 0.000 abstract description 6
- 239000002994 raw material Substances 0.000 abstract description 5
- 230000000694 effects Effects 0.000 abstract description 2
- WHDPTDWLEKQKKX-UHFFFAOYSA-N cobalt molybdenum Chemical compound [Co].[Co].[Mo] WHDPTDWLEKQKKX-UHFFFAOYSA-N 0.000 abstract 1
- 239000003792 electrolyte Substances 0.000 abstract 1
- 238000003860 storage Methods 0.000 abstract 1
- 230000002194 synthesizing effect Effects 0.000 abstract 1
- 239000000463 material Substances 0.000 description 6
- 238000004140 cleaning Methods 0.000 description 3
- 239000002131 composite material Substances 0.000 description 3
- 239000013078 crystal Substances 0.000 description 3
- 238000005054 agglomeration Methods 0.000 description 2
- 230000002776 aggregation Effects 0.000 description 2
- 239000011230 binding agent Substances 0.000 description 2
- 239000004020 conductor Substances 0.000 description 2
- 230000007547 defect Effects 0.000 description 2
- 238000003487 electrochemical reaction Methods 0.000 description 2
- 239000007772 electrode material Substances 0.000 description 2
- 235000019441 ethanol Nutrition 0.000 description 2
- CWQXQMHSOZUFJS-UHFFFAOYSA-N molybdenum disulfide Chemical compound S=[Mo]=S CWQXQMHSOZUFJS-UHFFFAOYSA-N 0.000 description 2
- 229910000510 noble metal Inorganic materials 0.000 description 2
- 230000027756 respiratory electron transport chain Effects 0.000 description 2
- 239000013077 target material Substances 0.000 description 2
- KEAYESYHFKHZAL-UHFFFAOYSA-N Sodium Chemical class [Na] KEAYESYHFKHZAL-UHFFFAOYSA-N 0.000 description 1
- 238000006555 catalytic reaction Methods 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 150000001875 compounds Chemical class 0.000 description 1
- 238000002484 cyclic voltammetry Methods 0.000 description 1
- 230000005518 electrochemistry Effects 0.000 description 1
- 239000002803 fossil fuel Substances 0.000 description 1
- 239000011964 heteropoly acid Substances 0.000 description 1
- 238000010335 hydrothermal treatment Methods 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 239000002905 metal composite material Substances 0.000 description 1
- 239000007769 metal material Substances 0.000 description 1
- 229910052976 metal sulfide Inorganic materials 0.000 description 1
- 238000002156 mixing Methods 0.000 description 1
- 230000006911 nucleation Effects 0.000 description 1
- 238000010899 nucleation Methods 0.000 description 1
- 230000010287 polarization Effects 0.000 description 1
- 238000001144 powder X-ray diffraction data Methods 0.000 description 1
- 230000000717 retained effect Effects 0.000 description 1
- 150000003839 salts Chemical class 0.000 description 1
- 238000001878 scanning electron micrograph Methods 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- 239000011684 sodium molybdate Substances 0.000 description 1
- 235000015393 sodium molybdate Nutrition 0.000 description 1
- TVXXNOYZHKPKGW-UHFFFAOYSA-N sodium molybdate (anhydrous) Chemical compound [Na+].[Na+].[O-][Mo]([O-])(=O)=O TVXXNOYZHKPKGW-UHFFFAOYSA-N 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
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- 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
- C25B11/091—Electrodes formed of electrocatalysts on a substrate or carrier characterised by the electrocatalyst material consisting of at least one catalytic element and at least one catalytic compound; consisting of two or more catalytic elements or catalytic compounds
-
- 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
- C25B11/02—Electrodes; Manufacture thereof not otherwise provided for characterised by shape or form
- C25B11/03—Electrodes; Manufacture thereof not otherwise provided for characterised by shape or form perforated or foraminous
- C25B11/031—Porous electrodes
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- 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
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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Electrochemistry (AREA)
- Materials Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Inorganic Chemistry (AREA)
- Catalysts (AREA)
- Inorganic Compounds Of Heavy Metals (AREA)
Abstract
The invention relates to a nickel-based compound @ MoS in the field of electrocatalytic hydrogen evolution2Preparation and application of core-shell nano material. The invention aims to solve the problems of rare raw material storage, high overpotential of hydrogen evolution reaction and high cost of the prior art for synthesizing the high-performance electrocatalyst. The patent designs and develops a nickel-based compound @ MoS2A core-shell nano material. The adopted method comprises the following steps: the Keggin type polyacid cobalt molybdenum dodecaoxide, selenium powder, foamed nickel and thioacetamide are used as raw materials, and a two-step hydrothermal synthesis method is adopted to prepare the nickel-based compound @ MoS2The core-shell nano material is suitable for electrocatalytic hydrogen evolution reaction in alkaline electrolyte and has the characteristics of low hydrogen evolution overpotential and high catalytic hydrogen production activity.
Description
Technical Field
The invention relates to the field of electrocatalytic hydrogen evolution, in particular to a nickel-based compound @ MoS2Preparation of core-shell nano material
Background
With the urgent need of the development of society for energy demand and the gradual exhaustion of fossil fuels, the ecological-friendly and sustainable hydrogen energy has attracted great attention. The electrocatalytic decomposition of water to produce hydrogen is a clean, simple and reproducible way capable of effectively relieving the energy demand. At present, the traditional and excellent electro-catalyst is based on a noble metal material, the catalytic activity of the noble metal Pt is strong, the electro-catalyst is concerned in the field of hydrogen evolution by electro-catalysis, but the application market of the electro-catalyst is limited by the rarity and the expensive price of the electro-catalyst. The polyacid has good redox ability and can reversibly accept and release one or more electrons. The electrochemical reaction is just generated by electron transfer, so that the electrochemical reaction can be used as an electrocatalyst. The polyacid is a polyacid inorganic-organic hybrid compound which can be combined with an organic system through covalent bonds and can replace @ doped with other elements to form a heteropoly acid nanocluster, so that the properties of the polyacid, such as electrochemistry and the like, can be adjusted to a certain extent. Furthermore, combining the polyacid with other substances by some means into a composite material is also a means to adjust the properties of the polyacid itself. And nickel foam is a highly conductive material having a three-dimensional porous structure. Therefore, the preparation of high activity, high stability and conductivity multi-metal composite materials from polyacids is a promising and meaningful work.
Disclosure of Invention
In order to overcome the defects of high price, poor stability and poor conductivity of polyacid used as a raw material and the like of the traditional electrocatalytic hydrogen evolution catalyst, the invention provides a method with simple preparation and low price, and a nickel-based compound @ MoS is prepared2The core-shell nano material as an electrocatalytic hydrogen evolution catalyst material has the advantages of higher specific surface area, higher electrocatalytic performance, good stability and the like.
The purpose of the invention is realized as follows:
nickel-based compound @ MoS2The preparation of the core-shell nano material comprises the following steps:
(1) cutting NF (foam nickel) to about 1x1.5cm2The rectangular square blocks are sequentially subjected to ultrasonic treatment for 30min by acetone, ethanol and deionized water, the foam nickel is repeatedly washed by the deionized water, and the rectangular square blocks are placed in an oven to be dried overnight at 80 ℃ for later use.
(2) Adding 0.05g of selenium powder into a polytetrafluoroethylene liner of a high-pressure reaction kettle with the volume of 25ml, then sequentially adding 3ml of deionized water and 2ml of ethylenediamine, magnetically stirring at room temperature for 10min to uniformly mix, adding 2 pieces of cleaned NF, and stirring for 10 min. Sealing, placing the reaction kettle into an electrothermal blowing dry box at 180 ℃ for heat preservation for 3h, taking out, and cleaning with deionized waterThen drying in a drying oven at room temperature for 6h to obtain dendriform Ni3Se2A front structure.
(3) 0.15g of cobalt molybdenum dodecanoic acid and 0.3g of thioacetamide are weighed and dissolved in 10ml of deionized water, stirred for 5min at room temperature, injected into a polytetrafluoroethylene lining with the volume of 25ml, and then placed into two pieces of treated NF. And (3) after sealing, putting the reaction kettle into an electric heating air blowing drying oven at 140 ℃ for heat preservation for 20h, taking out, washing with deionized water, and then putting into a drying oven at 60 ℃ for drying for 12 h.
The above nickel-based compound @ MoS2The application of the core-shell nano material is mainly in the aspect of water decomposition and hydrogen evolution by electrocatalysis.
The application method comprises the following steps: taking 1.0 mol/L potassium hydroxide aqueous solution as electrolyte solution, the nickel-based compound @ MoS2The core-shell nano material is used as a working electrode, a saturated calomel electrode is used as a reference electrode, and a carbon rod electrode is used as a counter electrode, so that a three-electrode system is built. In alkaline electrolyte solution, when the current density is 10mAcm-2The overpotential is 56mV, and the stable working state can be kept for 24 hours.
Compared with the prior art, the invention has the following characteristics:
the invention takes the improvement of the conductivity of the material and the change of the structure of the material as the starting points. By a hydrothermal synthesis method, three-dimensional porous NF with high conductivity is used as a catalyst growth carrier, Keggin type polyacid is used for providing a stable bimetallic source, the technical bottlenecks of uneven mixing of reaction raw materials, mutual separation, asynchronous reaction, inconsistent product morphology, easy agglomeration and the like in the traditional technical line for preparing metal sulfides by using simple sodium molybdate and metal salt as main raw materials are effectively overcome, and the defect that free metal salt has different nucleation rates in the hydrothermal process is effectively overcome. When the material is used as an electrocatalytic hydrogen evolution catalyst, the result shows that the material has good hydrogen evolution performance and lower overpotential, and in an alkaline electrolyte solution, when the current density is 10mAcm-2The overpotential is 56mV, and the stable working state can be kept for 24 hours. The invention adopts a simple two-step hydrothermal method to synthesizeThe trimetal self-supporting composite material avoids the agglomeration of the material, not only enhances charge transfer under the condition of no additional binder, but also avoids the covering of the use of the binder on an active center, thereby endowing the electrode with high catalytic activity, realizing the tight combination of the composite material and a conductive material, improving the stability of a catalyst while improving the electron transfer capacity, and preparing the nickel-based compound @ MoS2A core-shell nano material.
Detailed Description
The present invention will be described in detail below with reference to the accompanying drawings and examples.
Example 1, a Nickel-based Compound @ MoS2The core-shell nano material comprises the following preparation steps:
(1) cutting the foamed nickel to about 1X1.5cm2The rectangular square blocks are sequentially subjected to ultrasonic treatment for 30min by acetone, ethanol and deionized water, the foam nickel is repeatedly washed by the deionized water, and the rectangular square blocks are placed in an oven to be dried overnight at 80 ℃ for later use.
(2) Adding 0.05g of selenium powder into a polytetrafluoroethylene liner of a high-pressure reaction kettle with the volume of 25ml, then sequentially adding 3ml of deionized water and 2ml of ethylenediamine, magnetically stirring at room temperature for 10min to uniformly mix, adding 2 pieces of cleaned NF, and stirring for 10 min. Sealing, placing the reaction kettle into an electrothermal blowing drying oven at 180 ℃ for heat preservation for 3h, taking out, respectively cleaning with deionized water and absolute ethyl alcohol, and then placing into the drying oven for drying at room temperature for 6h to obtain dendriform Ni3Se2A front structure.
(3) 0.15g of cobalt molybdenum dodecanoic acid and 0.3g of thioacetamide are weighed and dissolved in 10ml of deionized water, stirred for 5min at room temperature, injected into a polytetrafluoroethylene lining with the volume of 25ml, and then placed into two pieces of treated NF. And (3) after sealing, putting the reaction kettle into an electric heating air blast drying oven at 140 ℃ for heat preservation for 20h, taking out, respectively cleaning with deionized water and absolute ethyl alcohol, and then putting into a drying oven at 60 ℃ for drying for 12 h.
The invention is further described with reference to the following drawings and examples:
drawings
As shown in FIG. 1 asNickel-based compound @ MoS2Hydrogen evolution polarization curve of core-shell nano material in alkaline electrolyte solution. It can be observed that when the current density is 10mAcm-2When the voltage is higher than the threshold voltage, the overpotential of the electrode material is 56 mV.
As shown in figure 2, a nickel-based compound @ MoS2The XRD spectrogram of the core-shell nano material can observe that different characteristic peaks appear in a target material and CoS2、MoS2、Ni3Se2And Ni3S2By comparing the standard color comparison card, the CoS can be seen2、MoS2、Ni3Se2And Ni3S2The diffraction peak of (a) appears on the PXRD pattern of the target material. Specifically, diffraction peaks appearing at 14.1 °, 32.6 °, 35.3 °, and 58.5 ° are assigned to MoS2The (002), (101), (102) and (110) crystal planes of (JCPDS, No.37-1492) and the diffraction peak positions appearing at 32.3 DEG, 36.2 DEG and 54.9 DEG are assigned to CoS2The (200), (210) and (311) crystal planes of (JCPDS, No.65-3322) have diffraction peak positions at 31.1 DEG, 49.7 DEG and 55.3 DEG ascribed to Ni3S2The (110), (113) and (300) crystal planes of (JCPDS, No.65-3322) have diffraction peak positions at 29.5 DEG, 42.6 DEG and 52.7 DEG ascribed to Ni3Se2(JCPDS, No.65-3322), (110), (202) and (122).
As shown in FIG. 3, a nickel-based compound @ MoS2The hydrogen evolution stability curve of the core-shell nano material can be observed to basically keep stable without obvious fluctuation, and the electrode material can continuously and stably work within 24 hours.
As shown in FIG. 4, a nickel-based compound @ MoS2The potential window of the core-shell nano material is a cyclic voltammetry curve chart of-0.80 to-0.60V under different sweep rates (10, 20, 30, 40, 50, 60, 70, 80, 90 and 100mV @ s).
As shown in FIG. 5, a nickel-based compound @ MoS2Scanning electron micrographs of the core-shell nano material under different sizes can observe that Ni is still retained in a sample after secondary hydrothermal treatment3Se2The tree structure of (1). The surface of the branches can be seen due to MoS2And CoS2Is changed toIt is very rough.
Claims (4)
1. Nickel-based compound @ MoS2The preparation method of the core-shell nano material comprises the following steps:
(1) cutting foam Nickel (NF) to about 1x1.5cm2The rectangular square blocks are sequentially subjected to ultrasonic treatment for 30min by acetone, ethanol and deionized water, the foam nickel is repeatedly washed by the deionized water, and the rectangular square blocks are placed in an oven to be dried overnight at 80 ℃ for later use.
(2) Adding 0.05g of selenium powder into a polytetrafluoroethylene liner of a high-pressure reaction kettle with the volume of 25ml, then sequentially adding 3ml of deionized water and 2ml of ethylenediamine, magnetically stirring at room temperature for 10min to uniformly mix, adding 2 pieces of cleaned NF, and stirring for 10 min. Sealing, placing the reaction kettle into an electrothermal blowing drying oven at 180 ℃ for heat preservation for 3h, taking out, washing with deionized water, and then placing into the drying oven for drying at room temperature for 6h to obtain the dendriform Ni3Se2A front structure.
(3) 0.15g of cobalt molybdenum dodecanoic acid and 0.3g of thioacetamide are weighed and dissolved in 10ml of deionized water, stirred for 5min at room temperature, injected into a polytetrafluoroethylene lining with the volume of 25ml, and then placed into two pieces of treated NF. And (3) after sealing, putting the reaction kettle into an electric heating air blowing drying oven at 140 ℃ for heat preservation for 20h, taking out, washing with deionized water, and then putting into a drying oven at 60 ℃ for drying for 12 h.
2. The nickel-based compound @ MoS of claim 12The application of the core-shell nano material is characterized in that a nickel-based compound @ MoS2The core-shell nano material is applied to the field of hydrogen production by electrocatalysis water decomposition.
3. The application according to claim 1, characterized in that the application method is as follows: taking 1.0 mol/L potassium hydroxide aqueous solution as electrolyte solution, wherein the nickel-based compound @ MoS2The core-shell nano material is used as a working electrode, a saturated calomel electrode is used as a reference electrode, a carbon rod electrode is used as a counter electrode, and in an alkaline electrolyte solution, when the current density is 10mAcm-2The overpotential was 56mV and remained stable after 24 hours of operation.
4. Nickel-based compound @ MoS2The preparation method and the electrocatalysis application of the core-shell nano material are characterized in that a nickel-based compound @ MoS is synthesized by a two-step hydrothermal method2The three-dimensional dendritic core-shell nano structure is formed by the method that the surface layer of a foam nickel substrate is compacted by Ni under the action of thioacetamide3S2And (4) covering. In Ni3Se2The surface obtains 1T-2H phase mixed MoS with a monolayer structure2Nanosheets, 1T-2H phase mixed MoS as compared to 2H phase2The conductive performance of the catalyst is better, and the catalyst has higher catalytic performance. Substrate NF and resulting Ni3S2、Ni3Se2The catalyst has good conductivity, and can effectively reduce the charge transfer resistance of the catalyst, so that the catalyst shows good hydrogen evolution performance.
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| CN110813323A (en) * | 2019-11-19 | 2020-02-21 | 中山大学 | High-efficiency and durable hydrogen evolution nickel-based catalyst constructed by atomic layer deposition and preparation method and application thereof |
| CN112058281A (en) * | 2020-05-14 | 2020-12-11 | 哈尔滨理工大学 | Preparation and application of bimetallic sulfide crystal derived from cobalt germanomolybdenum polyacid complex |
| CN112169812A (en) * | 2020-09-22 | 2021-01-05 | 陕西科技大学 | Preparation method of self-supporting core-shell nano electro-catalyst for full electrolysis of water |
| CN112501648A (en) * | 2020-12-01 | 2021-03-16 | 哈尔滨理工大学 | Preparation and application of nickel foam-loaded polyacid-derived manganese molybdenum sulfide |
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Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20180171493A1 (en) * | 2016-12-20 | 2018-06-21 | The Board Of Regents, The University Of Texas System | Cobalt molybdenum disulfide synthesized using alkyl-containing thiomolybdate precursors |
| CN109402654A (en) * | 2018-10-30 | 2019-03-01 | 长安大学 | A kind of MoS with substrate protective function2/Ni3Se2Compound Electrocatalytic Activity for Hydrogen Evolution Reaction agent and preparation method thereof |
| CN110813323A (en) * | 2019-11-19 | 2020-02-21 | 中山大学 | High-efficiency and durable hydrogen evolution nickel-based catalyst constructed by atomic layer deposition and preparation method and application thereof |
| CN112058281A (en) * | 2020-05-14 | 2020-12-11 | 哈尔滨理工大学 | Preparation and application of bimetallic sulfide crystal derived from cobalt germanomolybdenum polyacid complex |
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