Nickel/vanadium oxide hydrogen evolution electrode as well as preparation method and application thereof

A technology of hydrogen evolution electrode and vanadium oxide, which is applied in chemical instruments and methods, metal/metal oxide/metal hydroxide catalysts, electrodes, etc., can solve the problems of very different hydrogen evolution performance, slow kinetic process, and large hydrogen evolution overpotential and other problems, to achieve superior performance, high-efficiency decomposition of water and hydrogen evolution, and low hydrogen evolution overpotential

Active Publication Date: 2019-11-08
SHANDONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the inventors found that the nickel produced by many methods still has a large hydrogen evolution overpotential and a relatively slow kinetic process, and the hydrogen evolution performance is far from that of the noble metal platinum, which seriously restricts its promotion and development.

Method used

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  • Nickel/vanadium oxide hydrogen evolution electrode as well as preparation method and application thereof
  • Nickel/vanadium oxide hydrogen evolution electrode as well as preparation method and application thereof
  • Nickel/vanadium oxide hydrogen evolution electrode as well as preparation method and application thereof

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preparation example Construction

[0043] Ni / V involved in the present invention 2 o 3 The electrode preparation method steps are as follows:

[0044] Clean the carbon cloth base

[0045] In order to make the carbon cloth base more hydrophilic, soak the carbon cloth base in a mixed acid solution of sulfuric acid and nitric acid overnight, and then take it out and wash it with pure water and ethanol for 15 minutes respectively.

[0046] Preparation of NiV-LDH (Nickel Vanadium Layered Double Hydroxide) Precursor

[0047] Add 12mmol of urea and 6mmol of ammonium fluoride into 20ml of deionized water, and then add 0.8mmol of Ni(NO 3 ) 2 ·6H 2 O and 0.2 mmol of VCl 3 , after stirring evenly, pour the solution into a 20ml reaction kettle, and put a piece of cleaned carbon cloth in the reaction kettle, then seal the reaction kettle and put it in a 120 degree oven for 12 hours, and let it cool naturally after the reaction After reaching room temperature, the carbon cloth on which the active substance was grown w...

Embodiment 1

[0054] Preparation of NiV-LDH (Nickel Vanadium Layered Double Hydroxide) Precursor

[0055] Add 12mmol of urea and 6mmol of ammonium fluoride into 20ml of deionized water, and then add 0.8mmol of Ni(NO 3 ) 2 ·6H 2 O and 0.2 mmol of VCl 3 , after stirring evenly, pour the solution into a 20ml reaction kettle, and put a piece of cleaned carbon cloth in the reaction kettle, then seal the reaction kettle and put it in a 120 degree oven for 12 hours, and let it cool naturally after the reaction After reaching room temperature, the carbon cloth on which the active substance was grown was taken out, rinsed with ethanol and deionized water, and dried.

[0056] Preparation of Ni / V 2 o 3 electrode

[0057] Put the NiV-LDH precursor obtained above into a porcelain boat and seal it in a tube furnace, raise the temperature to 500 degrees at a rate of 8 degrees per minute in an argon-hydrogen atmosphere and keep it warm for 2 hours. After the reaction, the obtained The electrode is t...

Embodiment 2

[0061] Preparation of NiV-LDH (nickel-vanadium layered double hydroxide) precursors with different ratios of nickel and vanadium

[0062] Add 12mmol of urea and 6mmol of ammonium fluoride into 20ml of deionized water, and then add 0.6mmol of Ni(NO 3 ) 2 ·6H 2 O and 0.4 mmol of VCl 3 , after stirring evenly, pour the solution into a 20ml reaction kettle, and put a piece of cleaned carbon cloth in the reaction kettle, then seal the reaction kettle and put it in a 120 degree oven for 12 hours, and let it cool naturally after the reaction After reaching room temperature, the carbon cloth on which the active substance was grown was taken out, rinsed with ethanol and deionized water, and dried.

[0063] Preparation of Ni / V 2 o 3 electrode

[0064] Put the precursor obtained above into a porcelain boat and seal it in a tube furnace, raise the temperature to 500 degrees at a rate of 8 degrees per minute in an argon-hydrogen atmosphere and keep it warm for 2 hours. After the reac...

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Abstract

The invention provides a nickel / vanadium oxide hydrogen evolution electrode as well as a preparation method and application thereof. The method comprises the following steps: uniformly mixing a nickelsalt, a vanadium salt and a carbon cloth, and growing a NiV-LDH precursor on the carbon cloth substrate by adopting a hydrothermal method; and performing calcination on the above carbon cloth with the NiV-LDH precursor at a high temperature to obtain the Ni / V2O3 electrocatalytic hydrogen evolution electrode. The electrode provided by the invention has excellent hydrogen evolution performance andgood stability; and the preparation method provided by the invention is simple and convenient to operate, and has high practicability and considerable application prospects.

Description

technical field [0001] The invention belongs to the field of electrocatalytic water decomposition and hydrogen analysis, and the electrode is a nickel / vanadium oxide composite, which has an efficient effect of water decomposition and hydrogen analysis. Background technique [0002] The information disclosed in this background section is only intended to increase the understanding of the general background of the present invention, and is not necessarily taken as an acknowledgment or any form of suggestion that the information constitutes the prior art already known to those skilled in the art. [0003] With the large-scale use of fossil fuels, the problem of environmental pollution is becoming more and more serious. In order to solve environmental problems, it is imperative to develop new energy sources. Hydrogen, as a clean and non-polluting future energy source with high combustion value, has attracted people's attention. Among many hydrogen production technologies, electr...

Claims

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Application Information

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IPC IPC(8): C25B1/04C25B11/06C25B11/12B01J23/847
CPCC25B1/04B01J23/8472C25B11/051C25B11/091B01J35/33Y02E60/36
Inventor 黄柏标周鹏刘媛媛王泽岩张晓阳秦晓燕王朋郑昭科张倩倩
Owner SHANDONG UNIV
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