Carbon supported Co3O4-Mn3O4 double metal oxide composite catalyst and preparation method thereof

The invention relates to a carbon supported Co3O4-Mn3O4 double metal oxide composite catalyst and a preparation method thereof and belongs to the technical field of composite catalysts. In the catalyst, Co3O4 nanoparticles are supported on the surface of graphene, and Mn3O4 nanocrystals are selectively supported on the surfaces of Co3O4 nanoparticles, thus a special supported double metal oxide structure is formed. The catalyst can present good electrocatalytic activity and durability to oxygen reduction reaction in an alkaline medium. Compared with the traditional catalysts (precious metals) for oxygen reduction reaction, the catalyst has the advantages of low cost and high activity.