▎ 摘　　要

NOVELTY - Preparing cerium oxide-modified platinum-carbon nanoparticle electrocatalyst comprises (i) dispersing the platinum carbon in the solvent, and ultrasonically processing obtain a uniform dispersion, adding cerium metal salt precursor salt and alkali, stirring and reacting at 15-35℃ for 1-6 hours to obtain the reacted mixture, centrifuging and washing until the platinum carbon electrocatalyst modified by cerium hydroxide becomes neutral, and drying and grinding, (ii) reacting the electrocatalyst in a reducing atmosphere at 100-700℃ for 0.5-7 hours, cooling to room temperature, switching the gas to an inert atmosphere for 0.5-3 hours, grinding, where The concentration of the platinum carbon in the solvent is 1-20 mg ml-1, the concentration of the cerium precursor salt in the solvent is 0.01-20 mg ml-1; and the concentration of the alkali in the solvent is 0.01-10 mg ml-1. USE - The cerium oxide-modified platinum-carbon nanoparticle electrocatalyst is used in the oxidation reaction of hydrogen on the anode side of an alkaline fuel cell (claimed). ADVANTAGE - The method does not need any complex synthesis preparation technique, using simple green synthesis method to prepare the uniformly dispersed and uniform grain diameter of cerium oxide modified platinum carbon nano-particle electrocatalyst dispersing the platinum catalyst by ultrasonic, and then adding precursor salt solution of the cerium, then adding alkali solution to make the reaction system into alkaline, then centrifuging the dispersion after the reaction, washing and drying and then annealing in proper reducing atmosphere. The method provides the electro catalyst having high electrochemical activity specific surface area, suitable for alkaline fuel cell side anode reaction. DETAILED DESCRIPTION - An INDEPENDENT CLAIM is also included for the cerium oxide-modified platinum-carbon nanoparticle electrocatalyst.