B-P co-doped double-transition metal catalyst as well as preparation method and application thereof

Abstract

The invention discloses a B-P co-doped double-transition metal catalyst as well as a preparation method and application thereof. The catalyst comprises a carrier and B-P co-doped double-transition metals loaded on the carrier, the doping content of B atoms in the B-P co-doped double-transition metal is 0.20-0.60 mol / L, and the doping content of P atoms in the B-P co-doped double-transition metal is 0.10-0.50 mol / L; the preparation method of the catalyst comprises the following steps: (1) preprocessing a carrier; (2) respectively preparing a solution containing transition metal elements, a sodium hypophosphite solution, a boric acid solution and a trisodium citrate solution; (3) putting the carrier and the plating solution into an electrolytic cell, and electroplating a B-P co-doped double-transition metal catalyst on the carrier by using a double-pulse deposition method; and the catalyst can be used as a bifunctional electrode to be applied to electrolyzed water. The catalyst is low inreaction energy and high in catalytic activity, the hydrogen evolution over-potential is only 48 mV under a current density of 10 mA.cm <-2 >, and the catalyst can be used as a working electrode to be applied to hydrogen production through electro-catalytic water splitting decomposition; and the preparation method is simple, abundant in synthetic raw material reserves and low in cost.

Description

technical field [0001] The present invention relates to a catalyst and its preparation method and application, more specifically, to a B-P co-doped transition metal catalyst and its preparation method and application. Background technique [0002] With the increasing global population, the deteriorating environment, and the increasing shortage of resources are gradually exposed, which promotes the rapid development of hydrogen energy research. Electrolyzed water technology has the advantages of low raw material cost, easy operation, and high purity hydrogen output, but the energy conversion efficiency of electrochemical water splitting reaction is low, and high-efficiency catalysts are needed to promote the reaction. Catalysts such as Pt, Ru and other noble metals and their alloys are the most effective catalysts for electrolysis of water, but their cost is too high and their reserves are small. Non-noble transition metals have been widely studied as half-reaction electrocat...

AI Technical Summary

Problems solved by technology

Electrolyzed water technology has the advantages of low raw material cost, easy operation, and high purity hydrogen output, but the energy conversion efficiency of electrochemical water splitting reaction is low, and high-efficiency catalysts are needed to promote the reaction. Catalysts such as Pt, Ru and other noble metals and their alloys are the most effective catalysts for electrolysis of water, but their cost is too high and their reserves are small. Non-noble transition metals have been widely studied as half-reaction electrocatalysts for HER or OER in recent years, and their cost is low. Easy to obtain, but high reaction energy and low catalytic efficiency

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