Efficient nickel-based self-assembly oxygen evolution electrode

Abstract

According to the efficient nickel-based self-assembly oxygen evolution electrode, in-situ oxidation is directly achieved on the surface of a nickel-based metal electrode in the mode that a simple hydrothermal oxidation method is combined with electrochemical deposition, nickel oxide or hydroxide with better activity is generated, then an iron element is introduced through the electrochemical deposition, and the situation that traditional coating and chemical deposition are conducted on the surface of the nickel-based metal electrode is avoided. According to the preparation method, surface active substances are prevented from falling off due to preparation methods such as spraying, and meanwhile, iron elements generate iron oxide or hydroxide together due to the electrochemical oxidation effect, so that the generated nickel-iron oxide hydroxide is more complex in structure and has more catalytic sites and larger specific surface area; therefore, the overpotential of the electrode and the energy consumption of electrolyzed water are effectively reduced, and the efficiency of electrolyzed water equipment is improved.

Description

technical field [0001] The invention belongs to the subject of material science and the field of hydrogen production by electrolysis of alkaline water, and specifically provides the preparation of a nickel-based self-assembled oxygen evolution electrode for high-efficiency electrolysis of water to produce hydrogen. Background technique [0002] With the continuous development of industrial society, environmental pollution is becoming more and more serious. Hydrogen, a new type of clean energy, is more important in today's society. Among the various methods of hydrogen production, hydrogen production by electrolysis of water is an efficient and promising technology for obtaining high-purity hydrogen through electrical energy. However, the slow four-electron kinetics and high overpotential of the oxygen evolution reaction severely limit the efficiency of hydrogen production from water electrolysis. Traditional noble metal oxides such as iridium, ruthenium, and platinum are r...

AI Technical Summary

Problems solved by technology

[0004] However, the preparation conditions required for the reported materials are harsh, the process is complicated, and the energy consumption is large; and the prepared catalysts are generally attached to the substrate by methods such as spin coating, spray coating, and coating. There will be gaps in some parts, which will increase the resistance and cause the catalyst to fall off, which will seriously affect the life of the electrode.

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