Fluorine-doped spinel structure cobaltosic oxide electro-catalytic material and preparation method thereof

Abstract

The invention provides a fluorine-doped spinel structure cobaltosic oxide electro-catalytic material and a preparation method thereof, and belongs to the field of inorganic materials. The structural formula of the fluorine-doped spinel structure cobaltosic oxide electro-catalytic material provided by the invention is Co3O4-xFx, wherein x is more than 0 and less than 0.15. The preparation method comprises the following steps: putting Co3O4-x with oxygen defects and XeF2 into a high-pressure reaction kettle, sealing, and then carrying out a reaction at the temperature of 80 DEG C-100 DEG C for 10 h-14 h to obtain Co3O4-xFx. According to the material provided by the invention, the advantages of defect chemistry and fluorine chemistry are combined, and a method of replacing oxygen vacancies with F is adopted, so that the doping efficiency of F is improved, the electronic structure of the catalyst is improved, and the cobalt-based oxide has relatively high OER electrocatalytic activity under an alkaline condition. In addition, the preparation method provided by the invention is simple and efficient, the reaction conditions are mild, and the large-scale production requirement is met.

Description

technical field [0001] The invention relates to the field of inorganic materials, in particular to a fluorine-doped spinel structure cobalt trioxide electrocatalyst material and a preparation method thereof. Background technique [0002] Electrocatalytic water splitting is a sustainable strategy to provide efficient and clean energy through oxygen evolution reaction (OER) and hydrogen evolution reaction (HER). In theory, OER is a thermodynamic energy-increasing reaction accompanied by a gradual four-electron transfer process at a high overpotential, but its reaction kinetics are very slow, which is also a key bottleneck restricting the large-scale industrialization of electrolyzed water. Ru-based and Ir-based compounds are currently the most efficient water electrolysis catalysts for OER, but their high cost and scarcity greatly limit large-scale commercial applications. Therefore, it is still a great challenge to develop efficient catalysts that can greatly reduce the over...

AI Technical Summary

Problems solved by technology

In theory, OER is a thermodynamic energy-increasing reaction accompanied by a gradual four-electron transfer process at a high overpotential, but its reaction kinetics are very slow, which is also a key bottleneck restricting the large-scale industrialization of electrolyzed water.

Ru-based and Ir-based compounds are currently the most efficient catalysts for OER electrolysis of water, but their high cost and scarcity greatly limit large-scale commercial applications.

Therefore, it is still a great challenge to develop efficient catalysts that can greatly reduce the overpotential of the OER electrocatalytic reaction.

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