Electrolyzed-water catalytic material with nanometer core-shell structure of cobalt sulfide and molybdenum disulfide

Abstract

The invention discloses an electrolyzed-water catalytic material with a nanometer core-shell structure of cobalt sulfide and molybdenum disulfide. The electrolyzed-water catalytic material is composed of a catalytic active material and a carrier, wherein the catalytic active material is a material with the nanometer core-shell structure of cobalt sulfide and molybdenum disulfide; molybdenum disulfide is a shell; cobalt sulfide is a core; and the carrier is ultrafine carbon fiber. The electrolyzed-water catalytic material provided by the invention has high specific surface area and porosity, is favorable for diffusion and gas desorption of electrolyte, has the characteristics of dual functions of hydrogen evolution and oxygen evolution at the same time, and can be directly used as an electrode for electrocatalytic hydrogen preparation without the need of loading onto the electrode.

Description

technical field [0001] The invention relates to an electrolytic water catalytic material, in particular to an electrolytic water catalytic material with a cobalt sulfide and molybdenum disulfide nano core-shell structure. Background technique [0002] Hydrogen production by electrolysis of water is an efficient, convenient and one of the most promising methods for producing hydrogen. The hydrogen production reaction of electrolyzed water occurs on the electrode surface, including two basic half-reactions, the cathodic hydrogen evolution reaction and the anode oxygen evolution reaction. For hydrogen production by electrolysis of water, how to improve the activity of electrode catalytic materials, reduce the overpotential of hydrogen evolution and oxygen evolution, and improve the stability and durability of electrode materials is the focus and key of the research in the field of electrocatalysis. In recent years, there have been more and more studies on the use of transition...

AI Technical Summary

Problems solved by technology

[0004] So far, there are still many problems in the application of transition metal chalcogenide nanomaterials in the field of electrocatalytic hydrolysis. One is that the improvement of the catalytic activity of single-component materials is approaching the bottleneck; the other is that transition metal chalcogenides are semiconductors, and the electron transfer rate Therefore, a good conductive substrate to support the catalyst is very important for electrocatalysis; the third is the stability and recyclability of the electrode. The stability and recyclability of the electrocatalytic electrodes prepared by various methods are often poor.

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