▎ 摘　　要

NOVELTY - A graphene supported platinum-cobalt alloy nanoparticles composite catalyst comprises platinum-cobalt alloy nanoparticles with particle size of 2-10 nm, and graphene dispersed in carrier surface, is new. USE - Graphene supported platinum-cobalt alloy nanoparticles composite catalyst for use in alkaline or acidic medium of the oxygen reduction reaction (claimed) ADVANTAGE - The catalyst has very high electric catalytic activity and stability and better performance than commercial platinum/carbon catalyst. DETAILED DESCRIPTION - An INDEPENDENT CLAIM is also included for the preparation of the catalyst..