Preparation method of sponge copper-based loaded composite nanorod catalyst layer material

Abstract

The invention provides a preparation method of a sponge copper-based loaded composite nanorod catalyst layer material. The preparation method comprises the following steps of: [1] constructing a sponge copper-based Cu (OH) 2 layer and an amorphous CuO nano island; [2] loading an Eu2CuO4 surface layer with a nanorod structure on the sponge copper base; and (3) synthesizing the Eu2CuO4 catalytic layer with a composite nanorod Eu2CuO4 (at) EuCu (EDCI) 2 (BCS) 4 structure. The catalytic material prepared by the method has excellent water electrolysis oxygen evolution catalytic performance, and canmeet the requirements of an efficient and economic industrial water electrolysis technology.

Description

Technical field [0001] The invention relates to the field of electrolytic water electrode catalytic materials, in particular to a preparation method of a sponge copper-based supporting composite nanorod catalytic layer material. Background technique [0002] Water electrolysis technology is an effective way to produce hydrogen on a large scale. The cathode reaction and anode reaction of water electrolysis are hydrogen evolution reaction and oxygen evolution reaction, respectively. The electrode reaction process often involves the liquid phase mass transfer step of the reactant from the inside of the solution to the electrode / interface, the electrochemical step of the reactant gaining and losing electrons at the electrode to form a product, the desorption step of the product at the electrode, and the product leaving the electrode to the liquid inside the solution. Phase transfer step. Since the oxygen evolution reaction involves the transfer of four electrons in the water electro...

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Problems solved by technology

Since the oxygen evolution reaction involves the transfer of four electrons in the process of electrolysis of water, the activation energy of the reaction is high and the electrochemical step rate is slow; in addition, the oxygen bubbles produced by the oxygen evolution reaction have strong adhesion to the electrode, and the oxygen bubbles in the anode The desorption process of the electrode is relatively difficult, which hinders the liquid-phase mass transfer of the reactants to the electrode surface, resulting in a slow overall reaction of electrolyzed water, and it is difficult to carry out the reaction efficiently, which has also become a problem hindering the development of electrolyzed water technology.

So far, the oxygen evolution catalytic materials for electrolysis of water have been developed mainly from the perspective of reducing the activation energy of the electrochemical step in the process of electrolysis of water to increase the rate of the electrochemical step; however, the difficulty of desorption of oxygen bubbles on the electrode hinders the oxygen evolution of electrolysis of water The problem of the mass transfer step of the process is still not effectively solved, and the existing oxygen evolution catalytic materials cannot meet the requirements of efficient and economical industrial water electrolysis technology

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