▎ 摘　　要

NOVELTY - Catalyst comprises a graphene-based carrier and platinum (Pt)-based alloy supported on the graphene-based carrier, where the Pt-based alloy is an alloy of Pt and metal M. The metal M is selected from palladium (Pd), tungsten (W), tine (Sn), gold (Au), nickel (Ni), chromium (Cr), or cobalt (Co). The graphene-based carrier is aligned, and mass ratio of the graphene-based carrier to the Pt-based alloy is 2-4. The molar ratio of the Pt to metal M is 1-3. USE - Catalyst used in membrane electrode assembly or fuel cell stack (claimed). ADVANTAGE - The catalyst changes the atomic structure of Pt and improves the ability of Pt to resist carbon-monoxide (CO) toxicity. The graphene-based carrier has a larger specific surface area and better conductivity, which enhance the catalytic activity and anti-CO toxicity ability of the Pt-based alloy. DETAILED DESCRIPTION - An INDEPENDENT CLAIM is included for a method for preparing a catalyst, which involves: (A) providing a graphene-based carrier precursor, Pt precursor, and metal M precursor; (B) dispersing graphene-based carrier precursor, Pt precursor and metal M precursor in a reducing agent and mixing uniformly to obtain a mixed solution, where the molar ratio of Pt in the Pt precursor is 1 to 3, and ratio of the mass of the graphene-based carrier precursor to total mass of the Pt and the metal M is 2 to 4; and (C) adjusting the pH of the mixed solution to 10-14, under an anaerobic condition, applying an electric field to the mixed solution, and heatinng the mixed solution to 100-140 degrees C for reacting, and after the reaction is completed, obtaining the catalyst.