▎ 摘　　要

NOVELTY - A platinum-graphene nanocomposite comprises platinum nanoparticles formed on surface of graphene. The platinum-graphene nanocomposite has a specific surface area of 300 m2/g or more and catalytic activity of 1.2 or more which is ratio of maximum current value (If) during oxidation, and maximum current value (Ib) during reduction in voltage-current graph measured by cyclic voltammetry. USE - Platinum-graphene nanocomposite (claimed). DETAILED DESCRIPTION - An INDEPENDENT CLAIM is included for manufacture of platinum-graphene nanocomposite, which involves mixing a platinum precursor and an organic solvent, obtaining a reaction solution, spraying the reaction solution on graphene, and processing.