▎ 摘　　要

NOVELTY - Preparing platinum rare earth alloy platinum core-shell catalyst involves adding platinum precursor, rare earth precursor, and carbon carrier to organic solvent to be uniformly dispersed by ultrasonic, and then mixing the obtained solution, heating the reaction in an oil bath, and then cooling at room temperature. The obtained sample is placed at a high temperature under a protective atmosphere. The obtained sample is added to an acidic solution under heating and stirring, and then centrifuged, washed, and dried to obtain the black powder. USE - Method for preparing platinum rare earth alloy platinum core-shell catalyst used in proton exchange membrane fuel cell and as electrocatalyst in electrochemical redox (all claimed). ADVANTAGE - The method prepares the platinum rare earth alloy platinum core-shell catalyst in a simple, cost-effective and eco-friendly manner with controllable preparation.