Method for preparing nitrogen-doped carbon nano array-ferronickel hydrotalcite oxygen evolution electrode

Abstract

The invention discloses a method for preparing a nitrogen-doped carbon nano array-ferronickel hydrotalcite oxygen evolution electrode and aims to solve the problems that in the prior art a nano arraystructure is not easily prepared from a nitrogen-doped carbon matrix, a hydrotalcite structure is easy to aggregate, and toxic and harmful substances are involved in a preparation method. The method comprises the following steps: (1) preparing a nitrogen-doped carbon nano array by using an ion injection method; and (2) by taking the nitrogen-doped carbon nano array, a platinum sheet and a silver / silver chloride electrode as a working electrode, a pair electrode and a reference electrode respectively, performing constant potential deposition, so as to obtain a nitrogen-doped carbon nano array-ferronickel hydrotalcite composite electrode. The nitrogen-doped carbon nano array-ferronickel hydrotalcite oxygen evolution electrode is prepared in a green and environment-friendly mode, regulation and control on a matrix surface structure is achieved, a good former basis is made for research on acquiring of hydrogen energy from water electrolysis, and thus the method is applicable to popularization and application.

Description

technical field [0001] The invention belongs to the technical field of nano-composite materials, and in particular relates to a preparation method of a nitrogen-doped carbon nano-array-nickel-iron hydrotalcite oxygen evolution electrode. Background technique [0002] The water electrolysis method is an effective way to obtain hydrogen and oxygen. However, as a half-reaction of water electrolysis, the kinetic process of oxygen evolution reaction involves a four-electron process, which is usually slow and requires a high overpotential, which seriously hinders the large-scale practical application of water electrolysis. Although noble metal catalysts (such as iridium oxide, ruthenium oxide) exhibit good catalytic activity for oxygen evolution reaction, their low reserves, high price, and poor stability restrict their practical applications. In recent years, transition metal-based catalysts, especially nickel-iron hydrotalcite structures, have been used in the catalysis of oxyg...

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Problems solved by technology

[0004] The purpose of the present invention is to provide a method for preparing nitrogen-doped carbon nanoarray-nickel-iron hydrotalcite composite oxygen evolution electrode, which mainly solves the problem that the nitrogen-doped carbon substrate in the prior art is not easy to prepare a nano-array structure, and the hydrotalcite structure is easy Aggregation, the preparation method involves the problem of toxic and harmful substances

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