▎ 摘　　要

NOVELTY - Preparing high catalytic activity graphene-palladium and platinum core-shell structure nano flower complex comprises e.g. mixing concentrated sulfuric acid and concentrated nitric acid, placing in ice bath, stirring, adding natural crystalline flake graphite, stirring to prevent agglomeration, dispersing uniformly, adding potassium chlorate, reacting, washing product, ultrasonic peeling, flocculating, drying, grinding to obtain graphene oxide solid powder, preparing graphene-palladium complex, placing reaction liquid in microwave reactor, adding chloroplatinic acid solution, and reacting. USE - The method is useful for preparing high catalytic activity graphene-palladium and platinum core-shell structure nano flower complex (claimed). ADVANTAGE - The complex assures high catalytic oxidation activity of methanol, has great potential as fuel cell electrode material. The method is simple, uses non-toxic and harmless raw material, and does not require additional surfactant. DETAILED DESCRIPTION - Preparing high catalytic activity graphene-palladium and platinum core-shell structure nano flower complex comprises (i) preparing graphene oxide: mixing 10-100 ml 95-98% concentrated sulfuric acid and 20-100 ml 65-68% concentrated nitric acid, placing in 0 degrees C ice bath condition, under magnetic force, stirring for 5-50 minutes, then adding 1-200 g natural crystalline flake graphite, stirring to prevent agglomeration, after dispersing uniformly, adding 10-200 g potassium chlorate, retracting and removing ice bath under room temperature, reacting for 20-150 hours, washing product, ultrasonic peeling off, flocculating and adding sodium hydroxide, at 20-80 degrees C, drying for 2-10 hours, grinding to obtain graphene oxide solid powder, (ii) preparing graphene-palladium complex: providing 5-40 mg graphene oxide powder, ultrasonic dispersing using 10-200 ml deionized water to obtain mono-dispersed graphene oxide dispersion liquid, using 100-2000 mu l mol concentration of 15mM palladium chloride aqueous solution, stirring gradually, adding to the dispersion, continuously stirring for 5-15 minutes, adding 50-500 mg ascorbic acid, reacting for 30-120 minutes, stirring at room temperature, collecting reaction liquid to obtain palladium nano-particle in situ growth graphene, and (iii) placing the obtained reaction liquid in an microwave reactor, adding 200-2000 mu l mol concentration of 15mM chloroplatinic acid aqueous solution, reacting for 3-20 minutes at low radiation power of 60-100 degrees C, at 200-1000 W, cooling to room temperature, transferring into centrifugal tube, centrifuging at 4000-15000 rotations/minute for 3-20 minutes, using ethyl alcohol and water for washing, freezing and drying to obtain graphene core-shell structure nano flower palladium and platinum complex. An INDEPENDENT CLAIM is also included for graphene-palladium and platinum core-shell structure nano flower complex.