▎ 摘　　要

NOVELTY - A composite material comprises platinum base catalyst and graphene, where the graphene is present in an amount of 20-80 mass%. USE - Platinum base catalyst/graphene composite material. ADVANTAGE - The platinum base catalyst/graphene composite material is better for the diffusion of reactant and product, reduces mass transfer impedance, effective reduces platinum in high dissolution potentials, and significantly enhances the stability of the catalyst. DETAILED DESCRIPTION - An INDEPENDENT CLAIM is also included for a method for preparing the composite material, which involves taking platinum base catalyst and graphene, adding solution, uniformly mixing to obtain mixture A, ultrasonically dispersing the mixture A for 1-3 hours under ultrasonic wave to obtain mixed slurry, adding the slurry into a reaction kettle, heating at 120-180 degrees C for 1-12 hours to obtain material B, washing the material B with deionized water, filtering and vacuum drying at 80 degrees C to obtain platinum base catalyst/graphene composite material.