▎ 摘　　要

NOVELTY - Preparing platinum-based alloy catalyst comprising mechanically grinding and mixing a certain proportion of platinum/charcoal carrier, metal precursor, and deionized water, and rapidly freezing at -200 to -100degrees Celsius to obtain a solid mixture. The obtained solid mixture is transferred or in-situ freeze-dried to obtain a solid powder. The solid powder is subjected to rapid heating and sintering treatment in a reducing atmosphere, and then rapidly cooled to room temperature to obtain the final catalyst product. USE - Method for preparing a platinum-based alloy catalyst used in a fuel cell (claimed). Uses include but are not limited to catalyst oxygen reduction (ORR), hydroxide (HOR) activity, metal ion sedimentation layer, and sintering metal distribution. ADVANTAGE - The method is simple, convenient, and easy for industrial production and can reduce the process in a certain degree, shortens the process time, and the obtained catalyst material has activity better than the commercial catalyst. DESCRIPTION OF DRAWING(S) - The drawing shows a graphical representation depicting oxygen reduction reaction (ORR)-linear sweep voltammetry (LSV) curves of the platinum cobalt on carbon.