Novel nickel-iron electrolysis water oxygen production catalyst and preparation method thereof

Abstract

The invention provides a novel nickel-iron bimetallic electrolysis water oxygen production catalyst. The valence state of nickel is high-valence +3 and + 4. An effective measure for improving the oxygen production performance of the catalyst is to improve the valence states of nickel and iron, especially the valence state of nickel, so as to obtain higher intrinsic activity; the invention providesthe method for preparing the high-valence nickel (+ 3 and + 4) iron bimetallic oxygen production catalyst under the condition of approximate normal temperature and normal pressure; the catalyst showsparticularly excellent oxygen production activity; and the preparation method is simple and suitable for large-scale production. According to the basic principle of the novel nickel-iron bimetallic electrolysis water oxygen production catalyst prepared by the method, the invention further provides a method for converting multivalent metal from low valence to high valence, so that besides the nickel provided by the invention, more low valence metal can be converted into high valence metal, so that different actual requirements can be met.

Description

technical field [0001] The invention belongs to the field of electrocatalysis, and relates to a novel nickel-iron electrolysis water oxygen production catalyst and a preparation method thereof. Background technique [0002] In order to use renewable energy on a large scale, efficient energy storage devices must be developed. In energy conversion and energy storage technologies such as water electrolysis, fuel cells, metal-air batteries, and photoelectrochemical cells, the electrocatalytic oxygen production reaction is a key step. Since the oxygen generation reaction involves a 4-electron transfer process, a higher overpotential is needed to overcome the reaction activation energy barrier. Therefore, it is urgent to develop a class of oxygen generation catalysts with high efficiency, low overpotential, good stability and low price. The key issue. [0003] Non-precious metal catalysts have attracted extensive attention from researchers due to their price advantage. Among th...

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Problems solved by technology

[0005] The purpose of the present invention is to solve the technical problems in the prior art that the nickel-iron bimetallic electrolytic oxygen production catalyst has low intrinsic activity of oxygen production, complex preparation process and large process difficulty , thereby providing a nickel-iron bimetallic water oxygen generation catalyst with simple preparation process and suitable for large-scale production, which significantly improves the oxygen generation performance of the catalyst

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