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High-catalytic-activity amorphous metal oxide hydrogen evolution electrode and preparation method thereof

A high catalytic activity, amorphous metal technology, applied in the field of electrodes, can solve the problems of poor anti-reverse current capability, easy falling off of the catalyst, low catalytic efficiency, etc., and achieve the effect of low polarizability, excellent catalytic activity, and firm adhesion

Inactive Publication Date: 2015-09-09
派新(上海)能源技术有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] The purpose of the present invention is to provide a hydrogen evolution catalytic electrolysis for water electrolysis hydrogen production and its preparation method, which solves the problem of low catalytic efficiency of the existing water electrolysis hydrogen catalytic electrode, easy polarization under high current density, easy falling off of the catalyst, and resistance to reverse current. The problem of poor ability

Method used

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  • High-catalytic-activity amorphous metal oxide hydrogen evolution electrode and preparation method thereof

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Embodiment 1

[0028] The base nickel mesh was soaked in 20% sodium hydroxide solution for 4 hours, and then cleaned with deionized water. Laser texturing and oxidation treatment are used to form a porous transitional nickel oxide layer to increase the specific surface area of ​​the nickel mesh, which is beneficial to improving the catalytic activity of the hydrogen evolution electrode. Mix 80 g / L of ruthenium acetate, 150 g / L of nickel acetate, and 40 g / L of cerium acetate in ethanol solution according to the weight ratio of ethanol solution of 1:1:0.2 to prepare active coating precursor solution. The precursor solution is coated on the base nickel mesh by dipping and pulling process, and placed in an oven at 250 degrees for 40 minutes for thermal decomposition, so that the above precursor solution is decomposed into amorphous oxide, and then assisted by laser cladding for consolidation. Catalytic electrode 1 was obtained. The process conditions of the above laser cladding are: the las...

Embodiment 2

[0030] The base nickel mesh was soaked in 20% sodium hydroxide solution for 4 hours, and then cleaned with deionized water. Laser texturing and oxidation treatment are used to form a porous transitional nickel oxide layer. Mix 30 g / L ruthenium acetate, 300 g / L nickel acetate, and 70 g / L molybdenum acetate ethanol solution in a weight ratio of 1:1:1 to form an active coating precursor. The precursor solution was coated on the base nickel mesh by dipping and pulling process, placed in an oven at 300 degrees for 40 minutes, and then assisted by laser cladding (the process conditions were the same as in Example 1) for consolidation. Repeat dipping and pulling and thermal decomposition for 5 times to obtain catalytic electrode 2 .

Embodiment 3

[0032]The base nickel mesh was soaked in 20% sodium hydroxide solution for 4 hours, and then cleaned with deionized water. Laser texturing and oxidation treatment are used to form a porous transitional nickel oxide layer. Mix 70 g / L of ruthenium acetate, 50 g / L of molybdenum acetate, 75 g / L of strontium acetate and 90 g / L of cerium acetate ethanol solution according to the weight ratio of ethanol solution 1:1:0.2:0.2, and prepare active coating precursor. The precursor solution was coated on the treated base nickel mesh through the dipping and pulling process, placed in an oven at 350 degrees for 45 minutes, and then assisted by laser cladding (the process conditions were the same as in Example 1) for consolidation. Repeat dipping and pulling and thermal decomposition for 6 times to obtain catalytic electrode 3.

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Abstract

The invention discloses a high-catalytic-activity amorphous metal oxide hydrogen evolution electrode and a preparation method thereof. The electrode comprises an active coating made from an amorphous metal oxide, which is selected from any one or more of amorphous nickel oxide, amorphous ruthenium oxide, amorphous molybdenum oxide, amorphous cerium oxide, and amorphous strontium oxide. The preparation method comprises: step1, pre-treating a nickel screen to form a porous transition nickel oxide layer; step2, preparing an active coating precursor solution and coating the nickel screen with the precursor solution; and step3, performing thermal decomposition and laser-cladding assisted solidification to obtain the hydrogen evolution electrode. The preparation method is simple and is low in thermal decomposition temperature. The prepared hydrogen evolution electrode is high in catalytic activity and is not prone to polarize in a high current density. A catalyst firmly combines with a matrix and is not prone to fall off. The hydrogen evolution electrode has excellent anti-reverse-current performance. Compared with a conventional nickel screen, in a high current density of 4000A / m<2>, the electrode can reduce the hydrogen evolution overpotential by 250 mV. In a situation of frequent startup and shutdown, the voltage of an electrolytic bath is stable, and the fluctuation amplitude is small.

Description

technical field [0001] The present invention relates to an electrode, in particular to an amorphous metal oxide hydrogen evolution electrode with high catalytic activity (hereinafter referred to as "catalytic electrode") and a preparation method thereof, which is mainly used in a cathode for hydrogen production by electrolysis of water. Background technique [0002] Hydrogen energy is recognized as a clean energy source in the world, and it is attracting more and more attention as a low-carbon and zero-carbon energy source. Hydrogen production by water electrolysis is one of the most important hydrogen production methods in industry, but its high cathode overpotential leads to low electrolysis process efficiency and high energy consumption for electrolysis of water. Therefore, research and development of cathode materials with high catalytic performance, Reducing the hydrogen evolution overpotential is an effective way to reduce the energy consumption of water electrolysis. ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C25B1/04C25B11/06
CPCY02E60/36
Inventor 张延峰沈陈炎
Owner 派新(上海)能源技术有限公司
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