Design synthesis and water electrolysis hydrogen evolution research of efficient nickel-cobalt phosphide heterojunction catalyst

Abstract

The invention discloses a preparation method of a high-performance nickel-cobalt phosphide hydrogen evolution catalyst and an efficient water electrolysis hydrogen evolution research, and belongs to the technical field of water electrolysis hydrogen production and new energy. The preparation method is characterized by comprising the steps of: phosphorizing foam metal substrates such as foam cobalt and foam nickel through a chemical vapor deposition method to prepare a non-noble metal phosphide Co2P/Ni2P porous conductive skeleton; and soaking the conductive skeleton in a solution of cobalt, nickel and other metal salts, and drying and phosphorizing the conductive skeleton again to obtain the non-noble metal phosphide hydrogen evolution catalyst with a nano-porous structure which shows excellent catalytic hydrogen evolution activity and stability in neutral and alkaline environments. The unique structural design greatly exposes the active sites of the metal phosphide, reduces the contact resistance among the components of the material, contributes to hydrogen adsorption and release and accelerates charge transfer among different component interfaces, thereby greatly reducing the overpotential of hydrogen reaction and assisting the development of the hydrogen energy industry and hydrogen fuel cells in China.

Description

technical field [0001] The present invention relates to the research field of electrocatalyst applied to hydrogen production by electrolysis of water, in particular to a kind of M catalyst based on the surface growth of cobalt, nickel and other non-precious metal phosphide materials. x Preparation method of P nanoparticle catalyst and its application in electrocatalytic hydrogen evolution reaction in neutral and alkaline solution, wherein M refers to cheap transition metals such as cobalt and nickel. Background technique [0002] The current shortage of traditional energy around the world and the environmental degradation caused by the burning of coal, oil and other fuels are driving people to find and develop new renewable and clean energy. Various forms of renewable clean energy such as wind energy, solar energy, and geothermal energy have been developing rapidly, mainly because they have the advantages of large energy storage, cleanness, environmental protection, and inex...

AI Technical Summary

Problems solved by technology

However, due to the limited activity of non-noble metal catalysts, the energy conversion efficiency of the water electrolysis process is low, and the power consumption is large, which increases the cost of hydrogen production.

In addition, the hydrogen production technology in alkaline environment or acidic environment has to face the problem of electrode corrosion, so people have turned their attention to the production of hydrogen in neutral electrolyte, but due to the poor activity of the catalyst, the reaction mechanism is not clear. For reasons such as understanding, the hydrogen evolution reaction rate in a neutral environment is much lower than that in an alkaline and acidic environment

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