Transition metal based catalyst electrode of honeycomb macroporous structure as well as preparation method and application thereof

Abstract

The invention relates to a transition metal based catalyst electrode of a honeycomb macroporous structure as well as a preparation method and application thereof. The preparation method disclosed by the invention comprises the following steps: S1, synthesizing a polystyrene sub-microsphere aqueous solution; S2, preparing a transition metal salt solution, mixing the transition metal salt solution and the polystyrene sub-microsphere aqueous solution to obtain a mixed solution, spraying the mixed solution onto a conductive substrate for forming a film, and calcining at a high temperature so as to obtain an oxide film with a honeycomb macroporous structure; and S3, performing sulfidizing or selenizing or phosphating treatment on the oxide film at the high temperature in an inert atmosphere, thereby obtaining the transition metal based catalyst electrode of the honeycomb macroporous structure. The preparation method disclosed by the invention has the advantages that the operation is simple, the macroporous structure of the catalyst is easily maintained, the reproducibility is high, and a large-area electrode is conveniently prepared. Moreover, the catalyst electrode prepared by the invention has high specific surface area and capable of exposing more active sites and can be applied to dye-sensitized solar cells, electrochemical decomposition of water and the like.

Description

Technical field [0001] The invention relates to the field of preparation of electrocatalysts, in particular to a honeycomb-shaped macroporous structure transition metal-based catalyst electrode and a preparation method and application thereof. Background technique [0002] The development of new energy depends on the development and innovation of new materials. Among them, low-cost, high-performance electrocatalyst materials are a research focus of new energy materials. As we all know, noble metal nanomaterials are excellent electrocatalysts, which have high activity for hydrogen production (HER), oxygen production (OER), oxygen reduction reaction (ORR), etc., and have been used in hydrogen production by electrolysis of water, fuel cells, Dye-sensitized solar cells and other fields. However, the expensive price and scarce reserves of precious metals limit their wide application. The development of low-cost alternative electrocatalysts has important theoretical research signifi...

AI Technical Summary

Problems solved by technology

However, the direct preparation of macroporous TMDs and TMPs on conductive substrates to form catalyst electrodes has not been reported yet.

In addition, the synthesis methods of TMDs and TMPs electrocatalysts reported so far are mostly complex steps, which are not suitable for the simple preparation of large-area electrodes.

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