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. The preparation method comprises the following steps: mixing copper sulfateand hydrochloric acid, and uniformly carrying out stirring to obtain a mixed solution; standing washed foamed nickel into the mixed solution of copper sulfate and hydrochloric acid under a room temperature condition; after the standing is finished, taking out the foamed nickel, rinsing the foamed nickel in absolute ethyl alcohol for a plurality of times, and then carrying out drying by cold air;putting the treated product in a KOH solution to carry out an in-situ electrochemical oxidation reaction, carrying out rinsing by deionized water for a plurality of times, and carrying out draying bycold air for later use; step four, putting the product in a KOH solution for carrying out an oxygen evolution reaction; preparing a sodium sulfide solution with a certain concentration for later use;standing the product obtained in the step four in the sodium sulfide solution for sulfur doping treatment; and after sulfur doping treatment, putting the product in a KOH solution to carry out a hydrogen evolution reaction. The method is simple, all the synthesis preparation processes are carried out at room temperature, excellent hydrogen evolution and oxygen evolution performance are both excellent, no noble metal participates in the processes, and the method 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 ...

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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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