▎ 摘　　要

NOVELTY - The composite electrocatalyst comprises graphene as a carrier, tungsten carbide, and platinum. The tungsten carbide has a load capacity of 10-30%. The platinum has a load capacity of 5-8%. USE - Used as a composite electrocatalyst. ADVANTAGE - The composite electrocatalyst can be economically prepared with excellent chemical property and improved catalytic performance. DETAILED DESCRIPTION - An INDEPENDENT CLAIM is included for a method of preparing composite electrocatalyst.