Method for synthesizing high-activity Ni-Mo-Co hydrogen evolution catalyst under acid environment

A ni-mo-co, synthesis method technology, applied in electrodes, electrolysis process, electrolysis components, etc., can solve the problems of high overpotential, influence catalyst microstructure, influence catalyst activity, etc., to reduce overpotential, activity and microscopic The effect of structure optimization and good catalytic activity

Active Publication Date: 2018-07-24
SOUTH CHINA NORMAL UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0010] At present, the methods for preparing alloy-based hydrogen evolution catalysts mainly include hydrothermal method and electrodeposition method. The difference in preparation methods and processes will greatly affect the microstructure of the catalyst, and further affect the activity of the catalyst; The other half-reaction of electrolysis, the oxygen evolution reaction, has a relatively high overpotential in an acidic environment. In current industrial applications, in order to reduce production costs, water electrolysis is generally carried out in an alkaline environment. However, in order to adapt to various Due to the needs of industrial production, the current research on "full pH" catalysts is receiving more and more attention. Since many existing hydrogen evolution catalysts are unstable under acidic conditions, during the research process, the activity and stability of the catalysts in acidic environments are important considerations

Method used

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  • Method for synthesizing high-activity Ni-Mo-Co hydrogen evolution catalyst under acid environment
  • Method for synthesizing high-activity Ni-Mo-Co hydrogen evolution catalyst under acid environment
  • Method for synthesizing high-activity Ni-Mo-Co hydrogen evolution catalyst under acid environment

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Experimental program
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Effect test

Embodiment 1

[0045] (1) Preparation of catalyst electroplating solution Take a clean beaker, add chemical reagents as nickel source, molybdenum source, and cobalt source, dissolve in deionized water, and prepare catalyst electroplating solution as follows: 30mmol / L nickel chloride hexahydrate, 8mmol / L sodium molybdate dihydrate, 25mmol / L cobalt nitrate hexahydrate, 100mmol / L sodium pyrophosphate decahydrate and 1300mmol / L sodium bicarbonate; use a magnetic stirrer to stir for 4 hours, and put the catalyst plating solution Stand in air atmosphere for 3 days;

[0046] (2) Substrate cleaning Cut out 1×1cm foamed nickel, put the foamed nickel in concentrated sulfuric acid, and ultrasonicate for 7 minutes at a power of 300w. After ultrasonication, use deionized water, absolute ethanol, and acetone to clean and decontaminate alternately to obtain a clean surface. nickel foam substrate;

[0047] (3) Preparation of template plating solution Use deionized water to make a template plating solution ...

Embodiment 2

[0052] (1) Preparation of catalyst electroplating solution Take a clean beaker, add chemical reagents as nickel source, molybdenum source, and cobalt source, and dissolve them in deionized water. The components of the prepared catalyst electroplating solution are as follows: 25mmol / L nickel chloride hexahydrate, 20mmol / L sodium molybdate dihydrate, 18mmol / L cobalt nitrate hexahydrate, 75mmol / L sodium pyrophosphate decahydrate and 1500mmol / L sodium bicarbonate; use a magnetic stirrer to stir for 5 hours, and put the catalyst plating solution Stand in air atmosphere for 5 days;

[0053] (2) Substrate cleaning Cut out 1×1cm foamed nickel, put the foamed nickel in concentrated sulfuric acid, and ultrasonicate for 3 minutes at a power of 450w. After ultrasonication, use deionized water, absolute ethanol, and acetone to clean and decontaminate alternately to obtain a clean surface. nickel foam substrate;

[0054] (3) Preparation of template plating solution Use deionized water to m...

Embodiment 3

[0059] (1) Preparation of catalyst electroplating solution Take a clean beaker, add chemical reagents as nickel source, molybdenum source, and cobalt source, dissolve in deionized water, and prepare catalyst electroplating solution as follows: 35mmol / L nickel chloride hexahydrate, 25mmol / L sodium molybdate dihydrate, 12mmol / L cobalt nitrate hexahydrate, 80mmol / L sodium pyrophosphate decahydrate and 600mmol / L sodium bicarbonate; use a magnetic stirrer to stir for 5 hours, and put the catalyst plating solution Stand in air atmosphere for 7 days;

[0060] (2) Substrate cleaning Cut 1×1cm foamed nickel, put the foamed nickel in concentrated sulfuric acid, and ultrasonicate for 5 minutes at a power of 500w. After ultrasonication, use deionized water, absolute ethanol, and acetone to clean and decontaminate alternately to obtain a clean surface. nickel foam substrate;

[0061] (3) Preparation of template plating solution Use deionized water to make a template plating solution with ...

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Abstract

The invention discloses a method for synthesizing high-activity Ni-Mo-Co hydrogen evolution catalyst under the acid environment. The method comprises the following steps: (1) preparing catalyst electroplating liquid; (2) cleaning a substrate; (3) preparing template electrolyte; (4) manufacturing a template; (5) reprocessing the catalyst electroplating liquid; (6) depositing a catalyst. The methodhas the advantages of low cost, simpleness in operation and short period, and the prepared hydrogen evolution catalyst can remarkably reduce hydrogen evolution overpotential and can more remarkably reduce the hydrogen evolution overpotential under the acid environment.

Description

technical field [0001] The invention belongs to the synthesis field of hydrogen evolution catalysts, and in particular relates to a synthesis method of a Ni-Mo-Co catalyst with high hydrogen evolution performance in an acidic environment. Background technique [0002] water (H 2 O) The process of being electrolyzed by direct current to generate hydrogen and oxygen is called electrolysis of water. Current passing through water (H 2 O), a reduction reaction occurs at the cathode to generate hydrogen gas (H 2 ), and at the anode, the oxidation reaction of water to form oxygen (O 2 ). Due to the low energy consumption and low cost, electrolysis of water and hydrogen evolution is an important method to replace hydrogen production by steam reforming and become a new generation of hydrogen fuel. [0003] Although the hydrogen evolution reaction is regarded as the simplest electrochemical reaction, there are still some limiting factors to be improved in the actual hydrogen prod...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C25B11/06C25B1/04C25D3/56C25D3/12C25D5/14C25D5/18
CPCC25B1/04C25B11/04C25D3/12C25D3/56C25D5/14C25D5/18Y02E60/36
Inventor 高进伟何炜东魏巍吴夏艳
Owner SOUTH CHINA NORMAL UNIVERSITY
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