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Hydrogen evolution electrode, preparation method and applications thereof

A hydrogen evolution electrode and electrode technology, which is applied in the direction of battery electrodes, circuits, electrical components, etc., can solve the problems of insufficient hydrogen evolution activity of platinum-containing catalysts, and it is difficult to meet the needs of commercialization, so as to reduce platinum loading, improve activity, improve The effect of catalytic activity

Active Publication Date: 2018-06-15
DALIAN INST OF CHEM PHYSICS CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the hydrogen evolution activity of binder-free platinum-containing catalysts prepared directly on the electrode substrate is not enough, and it is difficult to meet the needs of commercialization.

Method used

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  • Hydrogen evolution electrode, preparation method and applications thereof
  • Hydrogen evolution electrode, preparation method and applications thereof
  • Hydrogen evolution electrode, preparation method and applications thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0034] Thick 1.7mm nickel foam (250g / cm 2 ) cut into an effective area of ​​4cm 2 After cleaning with acetone, hydrochloric acid and deionized water, electroplating in 0.1mol / L nickel chloride and 1mol / L ammonium chloride at a temperature of 40°C and an electroplating current of 1000mA / cm 2 , the electroplating time is 60s, the nickel foam after electroplating is aged in 0.1mol / L sodium chloride solution for 24h, after the electrode is cleaned, it is left to stand in a solution (pH=3) with a Pt content of 10ppm for 12h at a temperature of 40°C to obtain The platinum loading of the electrode is about 10ug / cm 2 , and then aged the electrode in 0.1mol / L sodium chloride for 24h, and dried it at 60°C for later use.

[0035] figure 2 The surface morphology of the prepared hydrogen evolution electrode can be seen from the figure that the uniform distribution of platinum nanoparticles on the surface of the hydroxide increases the active sites of the catalyst, from image 3 For th...

Embodiment 2

[0037] Increase the Pt content in Example 1 from 10ppm to 25ppm, and the platinum loading of the obtained electrode is about 25ug / cm2, and other conditions remain unchanged. Its hydrogen evolution performance see image 3 .

Embodiment 3

[0039] Increase the Pt content in Example 1 from 10ppm to 50ppm, and the platinum loading of the obtained electrode is about 50ug / cm2, and other conditions remain unchanged. Its hydrogen evolution performance see image 3 .

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Abstract

The invention relates to a hydrogen evolution electrode, a preparation method and applications thereof. The preparation method specifically comprises: washing a foam metal foam nickel as a substrate,and electrochemically depositing a layer of a granular alloy containing one or more than two selected from nickel, cobalt and molybdenum on the surface; carrying out room temperature aging in a solution containing chlorine ions to from a layer of a nano-sheet-like hydroxide with a nano-scale thickness on the surface of the electroplating layer, wherein the hydroxide is corresponding to the electrodeposition metal; and electrochemically depositing trace platinum, and continuously carrying out room temperature aging to increase the thickness of the hydroxide so as to obtain the hydrogen evolution electrode with the multi-level pore channel structure. According to the present invention, the prepared hydrogen evolution cathode has the low platinum loading, has the excellent hydrogen evolutionmass specific activity at the platinum loading of lower than 10 [mu]g / cm<2>, and has good stability in the application of magnesium-water batteries.

Description

technical field [0001] The invention relates to an ultra-low platinum loading hydrogen evolution electrode; the invention also relates to a preparation method and application of the hydrogen evolution electrode. Background technique [0002] The cathode of the magnesium-water battery uses water as the oxidant, which overcomes the limitation of the oxygen demand of the traditional magnesium-dissolved oxygen battery. Compared with the magnesium-dissolved oxygen battery, it can achieve higher power density and more stable power output. The cathode of the magnesium water battery is the hydrogen evolution reaction of water oxidation, and good hydrogen evolution performance is one of the keys to improve the performance of the battery. [0003] Among the currently reported catalysts, platinum-containing catalysts still have the best hydrogen evolution catalytic activity in a near-neutral environment, but they are expensive due to their small reserves in the earth’s crust and their ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M4/92H01M4/88H01M6/34
CPCH01M4/88H01M4/921H01M4/925H01M6/34Y02E60/50
Inventor 王二东刘乾锋孙公权
Owner DALIAN INST OF CHEM PHYSICS CHINESE ACAD OF SCI
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