Metal boride water splitting catalyst, preparation method and application in electrocatalytic water splitting

Abstract

The invention discloses a metal boride water-splitting catalyst, a preparation method and an application of the catalyst in electro-catalytic water splitting and belongs to the technical field of preparation of an electrocatalyst. The metal boride water-splitting catalyst is prepared with a solid-phase boriding method, transition metal is coated with a solid boriding agent, and boriding treatmentis performed through temperature programming heating. The boriding agent is prepared from a necessary boriding medium and an unnecessary filling agent. Compared with liquid boriding, a solid boridingmethod has the advantages that the surface clearing difficulty is low after boriding, requirements for equipment are low, and the method is applicable to boriding treatment of various transition metals. The catalyst has very good intrinsic catalysis activity and stability performance under the alkaline condition, and the required potential is 300-400 mV when the current density is 10 mA cm<-2>; the electro-catalytic water splitting oxygen evolution stability can be as long as at least 100 h while the performance is not attenuated, and the catalyst can replace noble metals to promote commercialapplication of electro-catalytic water splitting.

Description

technical field [0001] The invention belongs to the technical field of electrocatalyst preparation, and specifically relates to a series of high-efficiency metal boride water splitting catalysts, a preparation method and an application in electrocatalytic water splitting. Background technique [0002] In the development and research of new energy, hydrogen has attracted wide attention due to its many advantages such as high combustion value, non-polluting products and diversified utilization forms. In the 21st century, China, the United States, Japan, Canada, the European Union and Australia have all formulated hydrogen energy development plans, and have made many progresses in this field. Among the currently developed renewable new energy production and storage technologies, energy conversion and storage devices such as electrochemical water splitting hydrogen production, fuel cells, and metal-air batteries are widely used due to their advantages such as high efficiency, si...

AI Technical Summary

Problems solved by technology

However, because of its slow kinetic reaction, the electrolysis efficiency of water is severely limited. A good catalyst can reduce the overpotential of the oxygen evolution reaction and accelerate its kinetic reaction.

At present, noble metal catalysts with excellent performance (RuO 2 , IrO 2 etc.) high cost and scarce reserves, which greatly limit its large-scale production and application

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