▎ 摘　　要

NOVELTY - Method involves mixing carbon material loaded with first metal and graphene to obtain amixture, carrying out reduction reaction between the mixture and metal salt of second metal in presence of reducing gas and solvent, obtaining solid phase substance, carrying out metal replacement reaction between the solid phase substance and platinum salt in presence of inert gas and solvent, mixing the solid-phase substance with organic acid, and calcining in presence of an inert gas, where the metal activity of the first metal is weaker than that of platinum, the metal activity of the second metal is stronger than that of platinum, and each step is carried out in non-alkaline environment. The first metal comprises palladium, gold, rhodium, ruthenium and/or iridium. The second metal comprises copper, iron, cobalt, nickel, and/or zinc. The organic acid comprises acetic acid, propionic acid, succinic acid, tartaric acid, malic acid, citric acid and/or oxalic acid. USE - Preparation method of functionalized graphene-supported platinum-based alloy catalyst used in acidic medium oxygen reduction reaction (ORR) reaction and proton exchange membrane fuel cell (claimed). ADVANTAGE - The method improves the catalytic performance and stability of the functionalized graphene-supported platinum-based alloy catalyst. DETAILED DESCRIPTION - An INDEPENDENT CLAIM is also included for functionalized graphene-supported platinum-based alloy catalyst prepared by the above method.