A kind of preparation method of inorganic non-noble metal Ni-doped Cu-based bifunctional electrocatalyst

Abstract

The invention discloses a preparation method of an inorganic non-noble metal Ni-doped Cu-based bifunctional electrocatalyst. According to a certain concentration ratio, copper sulfate and hydrochloric acid are mixed and stirred evenly to obtain a mixed solution; , placed in a mixed solution of copper sulfate and hydrochloric acid; after standing, take out the nickel foam, rinse it in absolute ethanol several times, and then dry it with cold air; place the processed product in KOH solution for In-situ electrochemical oxidation reaction, take it out and wash it several times with deionized water, and dry it with cold wind for use; the product in step four is placed in KOH solution for oxygen evolution reaction; prepare a certain concentration of sodium sulfide solution for use; put the product in step four Stand still in sodium sulfide solution for sulfur doping treatment; after sulfur doping treatment, put it in KOH solution for hydrogen evolution reaction. The reaction of the invention is simple, all synthesis and preparation processes are at room temperature, and the performance of hydrogen evolution and oxygen evolution is excellent; no precious metal is involved, and it is suitable for large-scale industrial production.

Description

technical field [0001] The invention relates to a preparation method of an inorganic non-noble metal Ni-doped Cu-based bifunctional electrocatalyst, belonging to the technical field of electrolytic water catalysts. Background technique [0002] The excessive use of fossil fuels leads to energy crisis and environmental pollution. Hydrogen is one of the most promising energy sources to replace fossil fuels, and the use of electrocatalytic water splitting to produce hydrogen is one of the most promising methods. Platinum group metals have always been recognized as one of the catalysts with the best electrocatalytic performance, but their high price and limited reserves limit their large-scale use. Therefore, people have been exploring transition metals with better catalytic performance and lower price as catalysts for electrocatalytic water splitting to hydrogen production. [0003] Such as a kind of Ag-modified CuO nanobelt / copper foam composite electrode and its preparation ...

AI Technical Summary

Problems solved by technology

[0004] Nickel foam has a three-dimensional porous structure with a large surface area, but its own catalytic performance is not very high

Growth of transition metal nano-catalysts on the surface of smooth nickel foam to improve its catalytic performance has been studied a lot, mainly using hydrothermal synthesis and electrodeposition. These methods are relatively complicated, costly, and time-consuming, and are not suitable for Large-scale industrial application

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