A mixed metal oxide supported catalyst, its preparation method and use

By using a catalyst with mixed metal oxide ABOx supported on noble metal atoms M in a PEM water electrolysis device, the problems of insufficient activity and stability of existing IrO2 and RuO2 catalysts have been solved, and a high-efficiency and low-cost water electrolysis process has been achieved.

CN116607157BActive Publication Date: 2026-08-28SHINE HYDROGEN (SHANGHAI) NEW ENERGY TECHNOLOGY CO LTD
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Patent Information

Application Number
CN202310566883.1
Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
Filing Date
2023-05-18
Publication Date
2026-08-28
Estimated Expiration
2043-05-18

AI Technical Summary

Technical Problem

Existing precious metal oxide catalysts, such as IrO2 and RuO2, do not meet industrial requirements for activity and stability in PEM water electrolysis, and are also costly, making it difficult to meet the demand for efficient water electrolysis.

Method used

A mixed metal oxide ABOx was used as a support to load noble metal atoms M, forming a mixed metal oxide supported catalyst M-ABOx. By regulating the electronic structure of noble metal atoms and providing oxygen diffusion channels, the activity and stability of the catalyst were improved, while the noble metal content was reduced.

Benefits of technology

A catalyst with high activity and long-term stability under acidic and oxidizing environments has been developed, reducing catalyst costs and making it suitable for PEM water electrolysis devices.

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Abstract

This invention belongs to the field of electrocatalysis technology, specifically a mixed metal oxide supported catalyst, its preparation method, and its application. In this mixed metal oxide supported catalyst, the active component is selected from Ru, Ir, and Pt, and the support is a metal oxide ABOx formed by the homogeneous blending of metal oxides AOm and Bon; A and B are respectively selected from transition metal atoms or main group metal atoms; AOm... m The main support component contains at least two metal-oxygen coordination structures, and is associated with BO, the secondary support component. n A blending interface is formed, providing oxygen diffusion channels required for the oxygen evolution reaction (OER). B is used to regulate the electronic structure of the host support A, thereby regulating the electronic structure of the noble metal atoms, which helps improve the OER activity and stability of the catalyst. The catalyst of this invention can be used to prepare OER catalyst electrodes and water electrolysis devices. The preparation process of this invention is simple, and it can achieve high OER activity and stability while reducing the noble metal content, showing broad application prospects.
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