▎ 摘　　要

NOVELTY - A platinum/graphene nano electro-catalyst comprises graphene as carrier and platinum as active ingredient present at 10-40 mass%. USE - A platinum/graphene nano electro-catalyst used in fuel cell. ADVANTAGE - The catalyst is energy-saving; and has simple technique, uniform grain size of platinum and sodium particles, and excellent electro-catalysis property. DETAILED DESCRIPTION - An INDEPENDENT CLAIM is included for a method of preparing platinum/graphene nano electro-catalyst by ultrasonically dispersing 0.48-1.3 g/L graphene oxide nano pieces in liquid polyhydric alcohol, adding 0.0005-0.05 mol/L chloroplatinic acid solution and 0.007-0.013 mol/L sodium acetate solution, and uniformly mixing; and carrying out microwave hydrothermal reaction for 5-10 minutes, filtering, washing, and drying.