Modified foamed nickel supported noble metal catalyst hydrogen evolution electrode and preparation method thereof

A technology of noble metal catalysts and hydrogen evolution electrodes, which is applied in the direction of electrodes, electrode shapes/types, metal material coating processes, etc., and can solve problems such as inability to effectively control the dispersion of noble metal catalysts, shedding of active components, and weakening of electrocatalytic stability of electrodes , to achieve excellent electrocatalytic hydrogen evolution activity and stability, achieve dispersion, and improve the effect of electron transport ability

Active Publication Date: 2019-11-12
阪吉化学(上海)有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] However, using the coating method to support noble metal electrocatalysts on the foamed nickel substrate cannot effectively control the dispersion of the noble metal catalyst on the substrate, and it is easy to cause the active components to fall off from the substrate during the hydrogen release process, which weakens the electrocatalytic stability of the electrode. sex
Therefore, it is still a huge challenge to develop a facile method to prepare hydrogen evolution electrodes with unique structures and highly active noble metal catalysts.

Method used

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  • Modified foamed nickel supported noble metal catalyst hydrogen evolution electrode and preparation method thereof
  • Modified foamed nickel supported noble metal catalyst hydrogen evolution electrode and preparation method thereof
  • Modified foamed nickel supported noble metal catalyst hydrogen evolution electrode and preparation method thereof

Examples

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Embodiment 1

[0034] The commercial nickel foam (thickness is 1.6mm, area density is 320g / m 2 ) cut into 2×3cm 2 Placed in 3mol / L hydrochloric acid aqueous solution for ultrasonication for 15min, rinsed with water, then placed in absolute ethanol and deionized water for ultrasonication for 20min respectively, and then placed in a constant temperature drying oven at 60°C to dry to constant weight. The dried nickel foam was placed in a tube furnace and heated with H 2 15% H by volume 2 / Ar mixed gas for temperature-programmed reduction treatment, the reduction treatment temperature of nickel foam is 350 °C, the temperature program rate is 10 °C / min, the reduction treatment time is controlled at 1 h, and the pre-treated nickel foam is obtained after cooling to room temperature.

[0035] Prepare 0.005mol / L NH 4 F electrolyte, with ethylene glycol and water as a mixed solvent, the volume ratio of ethylene glycol and water is 1:0.1, the pretreated nickel foam is used as the anode, the commerci...

Embodiment 2

[0040] The commercial nickel foam (thickness is 1.2mm, area density is 300g / m 2 ) cut into 2×3cm 2 Placed in 3mol / L hydrochloric acid aqueous solution for ultrasonication for 15min, rinsed with water, then placed in absolute ethanol and deionized water for ultrasonication for 20min respectively, and then placed in a constant temperature drying oven at 60°C to dry to constant weight. The dried nickel foam was placed in a tube furnace and heated with H 2 5% H by volume 2 / Ar mixed gas for temperature-programmed reduction treatment, the reduction treatment temperature of nickel foam is 300 °C, the temperature program rate is 5 °C / min, the reduction treatment time is controlled at 1 h, and the pretreated nickel foam is obtained after cooling to room temperature.

[0041] Prepare 0.005mol / L NH 4 NO 3 Electrolyte, with ethanol and water as a mixed solvent, the volume ratio of ethanol and water is 1:1, the pretreated foamed nickel is used as the anode, the commercial platinum she...

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Abstract

The invention relates to a modified foamed nickel supported noble metal catalyst hydrogen evolution electrode and a preparation method thereof. The preparation method comprises the following steps: (1) pretreating foamed nickel; (2) by taking the pretreated foamed nickel as an anode, a platinum sheet as a cathode, and an alcohol-water mixed solution of an ammonium salt as electrolyte, performing anode oxidation retreatment so as to obtain a modified foamed nickel substrate; and (3) putting the modified foamed nickel substrate into a precursor homogeneous solution with noble metal elements, performing heating treatment, and performing in-situ growth on the noble metal elements on the surface of the modified foamed nickel. The foamed nickel used in the electrode is rich in source, the electrode preparation process is simple and controllable, the equipment requirement is low, the prepared noble metal catalyst is small in granule size, uniform in dispersion and solid in combination with substrates, the loading amount of noble metal granules on the modified foamed nickel substrate is low, the raw material cost can be reduced, and t he prepared electrode has excellent electro-catalysis hydrogen evolution activity and stability in water decomposition and has significant application prospects.

Description

technical field [0001] The invention belongs to the technical field of preparation of electrocatalytic hydrogen evolution materials, and in particular relates to a hydrogen evolution electrode supported by a modified foam nickel supported noble metal catalyst and a preparation method thereof. Background technique [0002] Hydrogen energy has been widely considered as one of the alternative clean energy sources to solve the current energy crisis and environmental pollution because of its wide sources, high energy density, environmental friendliness and renewable characteristics. Among the many hydrogen production technologies, electrocatalytic water splitting hydrogen can convert electrical energy into stable chemical energy, and can obtain pure hydrogen without producing other by-products. It is a very competitive solution for sustainable energy hydrogen storage. In the process of electrocatalytic water splitting, efficient catalysts are needed to reduce the overpotential of...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C25B11/06C25B11/03C25B1/04C25D11/34C23C18/08C23C18/04B82Y40/00B82Y30/00
CPCB82Y30/00B82Y40/00C23C18/04C23C18/08C25B1/04C25D11/34C25B11/031C25B11/091Y02E60/36
Inventor 王远强顾燕芳史军辉杨梦茹芮一川
Owner 阪吉化学(上海)有限公司
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