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Preparation method of porous nickel-based copper rhenium composite hydrogen evolution electrode

A technology of hydrogen evolution electrode and porous nickel, which is applied in the direction of electrodes, electrolysis process, electrolysis components, etc., can solve the problems of complex loading process of active materials, difficulty in regulating the pore structure of the matrix, and difficult control of loading capacity, etc., and achieve excellent catalytic hydrogen evolution effect, excellent Hydrogen evolution catalytic activity, the effect of enhancing electrocatalytic performance

Active Publication Date: 2019-05-14
ZHEJIANG UNIV OF TECH
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  • Summary
  • Abstract
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  • Claims
  • Application Information

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Problems solved by technology

[0005] In order to solve the problems of difficulty in regulating the pore structure of the matrix of the existing nickel-based composite electrode material, the complex loading process of the active material and the difficult control of the loading capacity, the present invention provides a preparation method of a porous nickel-based copper-rhenium composite hydrogen evolution electrode

Method used

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  • Preparation method of porous nickel-based copper rhenium composite hydrogen evolution electrode
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  • Preparation method of porous nickel-based copper rhenium composite hydrogen evolution electrode

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Embodiment 1

[0040] (1), pretreatment of Ni substrate

[0041] First, grind the Ni substrate with 400#, 800# sandpaper to remove the oxide film on the surface of the Ni substrate, then put it into absolute ethanol for ultrasonic treatment for 5 minutes, and finally rinse it with deionized water and dry the water, seal the Ni substrate, and expose it The area is 1×1cm 2 , to be used after the sealant is air-dried;

[0042] (2) Preparation of porous nickel-based precursor by electrodeposition

[0043] A two-electrode system is adopted, with the Ni substrate processed in step (1) as the working electrode, the platinum electrode as the counter electrode, and the mixed aqueous solution containing 0.2mol / L nickel chloride and 0.85mol / L ammonium chloride as the electrolyte, The pH of the solution was adjusted to 1 with hydrochloric acid, the electrodeposition temperature was 25°C, and at 5.0A / cm 2 Depositing at a current density of 10 seconds, using the hydrogen bubbles generated by the cathod...

Embodiment 2

[0048] (1), pretreatment of Ni substrate

[0049] First, grind the Ni substrate with 400#, 800# sandpaper to remove the oxide film on the surface of the Ni substrate, then put it into absolute ethanol for ultrasonic treatment for 5 minutes, and finally rinse it with deionized water and dry the water, seal the Ni substrate, and expose it The area is 1×1cm 2 , to be used after the sealant is air-dried;

[0050] (2) Preparation of porous nickel-based precursor by electrodeposition

[0051] A two-electrode system is adopted, with the Ni substrate processed in step (1) as the working electrode, the platinum electrode as the counter electrode, and the mixed aqueous solution containing 0.1mol / L nickel chloride and 3mol / L ammonium chloride as the electrolyte, hydrochloric acid Adjust the pH of the solution to 3, and the electrodeposition temperature to 35°C, at 1.5A / cm 2 Depositing at a current density of 25 seconds, using the hydrogen bubbles generated by the cathodic hydrogen evo...

Embodiment 3

[0055] (1), pretreatment of Ni substrate

[0056] First, grind the Ni substrate with 400#, 800# sandpaper to remove the oxide film on the surface of the Ni substrate, then put it into absolute ethanol for ultrasonic treatment for 5 minutes, and finally rinse it with deionized water and dry the water, seal the Ni substrate, and expose it The area is 1×1cm 2 , to be used after the sealant is air-dried;

[0057] (2) Preparation of porous nickel-based precursor by electrodeposition

[0058] A two-electrode system is adopted, with the Ni substrate processed in step (1) as the working electrode, the platinum electrode as the counter electrode, and the mixed aqueous solution containing 0.1mol / L nickel chloride and 0.85mol / L ammonium chloride as the electrolyte, The pH of the solution was adjusted to 5 with hydrochloric acid, the electrodeposition temperature was 45°C, and at 2A / cm 2 Depositing at a current density of 25 seconds, using the hydrogen bubbles generated by the cathodic...

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Abstract

The invention relates to the field of composite electrode materials, and provides a preparation method of a porous nickel-based copper rhenium composite hydrogen evolution electrode in order to solvethe problems of complicated preparation technology and poor performance of an existing composite electrode material. The preparation method includes the steps: 1) Ni substrate pretreatment: performingsurface treatment, sealing and gluing on a Ni substrate and exposing an area to be processed; 2) porous nickel electro-deposition preparation: taking the Ni substrate as a working electrode, taking aplatinum electrode as a counter electrode, taking water solution containing nickel chloride and ammonium chloride as electrolyte and performing electro-deposition; 3) porous nickel-based copper rhenium composite hydrogen evolution electrode preparation: taking the Ni substrate with deposited porous nickel as the working electrode, taking the platinum electrode as the counter electrode, taking a saturated calomel electrode as a reference electrode, taking acid solution with dissolved copper sulfate, ammonium rhenate and sodium sulfate as electrolyte and performing electro-deposition to obtainthe composite hydrogen evolution electrode. The method is simple and efficient, an electrode microstructure can be conveniently regulated, and the prepared electrode has excellent hydrogen evolution catalysis activity.

Description

technical field [0001] The invention relates to the field of composite electrode materials, in particular to a preparation method of a porous nickel-based copper-rhenium composite hydrogen evolution electrode. Background technique [0002] At present, the energy demand of human beings mainly comes from fossil fuels, but the reserves of fossil fuels on the earth are limited, which makes human beings have to look for alternative energy sources. Hydrogen has entered people's field of vision because its combustion product is water and has no pollution to the environment. Alternatives to fossil fuels. Hydrogen production by electrolysis of water is one of the main sources of hydrogen production, so it is urgent to find highly catalytically active cathode materials for hydrogen evolution. [0003] Nickel-based materials, including nickel metal, nickel-based alloys, nickel-based composite materials, porous nickel, etc., have very obvious catalytic activity for hydrogen evolution r...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C25B11/06C25B1/04C25D3/12C25D3/56
CPCY02E60/36
Inventor 张惠斌林志茂郑国渠曹华珍
Owner ZHEJIANG UNIV OF TECH
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