Preparation method of nitrogen-doped water electrolysis oxygen production heterogeneous catalyst

Abstract

The invention discloses a preparation method of a nitrogen-doped water electrolysis oxygen production heterogeneous catalyst. The method comprises the following steps: dissolving cobalt acetate, thiourea and ammonium fluoride into a mixed solvent consisting of deionized water and ethylene glycol to obtain a precursor solution, transferring the precursor solution into a hydrothermal kettle, addingfoamed nickel, carrying out a solvothermal one-pot reaction, carrying out heating twice, carrying out in-situ co-growth on the foamed nickel to obtain a Co4S3 / Ni3S2 nanosheet composite material with aheterostructure, and carrying out high-temperature nitridation treatment on the foamed nickel-based composite material after the solvothermal reaction is finished to finally obtain the foamed nickel-based nitrogen-doped water electrolysis oxygen production heterogeneous catalyst. The nanosheet composite material growing on foamed nickel in situ is used as a water electrolysis oxygen production catalyst, has a lower cost than a noble metal and metal oxide water electrolysis oxygen production catalyst, and has better intrinsic catalytic activity than a single-component transition metal sulfidenanosheet catalyst.

Description

technical field [0001] The invention relates to a preparation method of a nitrogen-doped heterogeneous catalyst for oxygen production by electrolysis of water, which belongs to the field of energy and catalytic materials. [0002] technical background [0003] The sustainable development of human society is facing many challenges such as the limited reserves of fossil fuels and the environmental pollution caused by them. Electrolysis of water to produce hydrogen and oxygen is a promising method for large-scale production of clean energy. However, electrolysis of water for oxygen production faces a higher kinetic barrier, which limits the efficiency of water splitting. Therefore, it is very important to develop efficient and inexpensive catalysts for electrolysis of oxygen production. At present, noble metal oxides such as iridium dioxide and ruthenium dioxide are considered to be the most efficient catalysts for electrolyzing water to produce oxygen, but their scarcity and hi...

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Problems solved by technology

[0004] At present, transition metal compounds are used as electrocatalytic oxygen evolution catalysts, and usually need to use adhesives to load them on other conductive substrates for convenient application. However, the combination of catalysts and substrates is not strong, and it will hinder the transmission of charges in severe cases. , and limit the full exposure of catalyst active sites, reduce catalyst activity and catalytic efficiency, resulting in waste of materials and energy

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