▎ 摘　　要

NOVELTY - A graphene-supported platinum catalyst preparing method involves dissolving chloroplatinic acid in deionized water into brown volumetric flask to obtain chloroplatinic acid solution. The chloroplatinic acid solution is added with 10 l deionized water to prepare chloroplatinic acid solution heat-resistant container, followed by using spectroscopically pure graphite rod as electrode, cathode and anode, arranging two electrodes along a straight horizontal line, and submerging beneath the surface at 30mm. USE - Method for preparing graphene-supported platinum catalyst. ADVANTAGE - The method enables preparing the graphene-supported platinum catalyst with better catalytic activity and wide application range. DETAILED DESCRIPTION - A graphene-supported platinum catalyst preparing method involves using underwater arc discharge circuit, dissolving 1 g chloroplatinic acid in 50 ml deionized water into brown volumetric flask to obtain 0.039 mol/L chloroplatinic acid solution. The 5 ml chloroplatinic acid solution is added with 10 l deionized water to prepare 0.00002 mol/L chloroplatinic acid solution heat-resistant container, followed by using spectroscopically pure graphite rod as electrode, cathode with diameter of 30mm, anode with diameter of 8mm, arranging two electrodes along a straight horizontal line, and submerging beneath the surface at 30mm, controlling current and voltage at 79 A and 25V, arcing gap between the two electrodes to be 1 mm, using arc discharge to evaporate the anode structure that providing graphene carbon source for growth, reducing salt solution to metal cations generated platinum metal particles supported on the surface of the graphene structure, and using arc discharge circuit using anode evaporation providing graphene structure growth and carbon source, metal positive ion reduction in salt solution generating platinum metal granule, and loading on surface of graphite alkene structure.