▎ 摘　　要

NOVELTY - Preparing platinum-nickel alloy nanoparticle-graphene composite catalyst involves dispersing graphene oxide in deionized water to obtain uniform graphene oxide solution, using aqueous ammonia to adjusting to alkaline, dissolving nickel salt in excess aqueous ammonia, shaking well, adding chloroplatinic acid hexahydrate with specific ratio of platinum-nickel:=1:1, shaking well, washing with ethanol for multiple times, putting in an oven to drying to obtain a platinum nickel alloy precursor USE - Method for preparing platinum-nickel alloy nanoparticle-graphene composite catalyst. ADVANTAGE - The method enables to prepare platinum-nickel alloy nanoparticle-graphene composite catalyst by simple operation, short time consumption, easy batch preparation, and uses plasma-assisted high-temperature reduction, to avoid the tediousness and environmental problems of hydrothermal reduction, a high-efficiency methanol oxidation catalyst is synthesized without using a chemical reducing agent, which greatly shortens the synthesis time. DETAILED DESCRIPTION - Preparing platinum-nickel alloy nanoparticle-graphene composite catalyst involves dispersing graphene oxide in deionized water to obtain uniform graphene oxide solution, using aqueous ammonia to adjusting to alkaline, dissolving nickel salt in excess aqueous ammonia, shaking well, adding chloroplatinic acid hexahydrate with specific ratio of platinum-nickel:=1:1, shaking well, washing with ethanol for multiple times, putting in an oven to drying to obtain a platinum nickel alloy precursor, dissolving the platinum nickel alloy precursor in the graphene oxide solution, oscillating ultrasonically to making uniformly dispersed to obtain a catalyst precursor, freezing, drying the obtained catalyst precursor to obtain a catalyst precursor powder, placing the obtained catalyst precursor powder uniformly in the porcelain boat, putting the porcelain boat into the IC-PECVD equipment, evacuating to pascal, pouring the nitrogen/hydrogen mixed gas ratio of 1/2-3, heating to 500-700degrees Celsius, keeping the temperature for 1-2 hours at the same time the discharge power is 100-200 watt, the heating rate is 5-20degrees Celsius/minutes, stooping the glow discharge equipment after the end, and cooling naturally to room temperature to obtain a platinum-nickel alloy nanoparticle-graphene composite catalyst. DESCRIPTION OF DRAWING(S) - The drawing shows the CV curves of prepared composite catalyst GPN-TE, GPN-T, GPN-E and commercial Pt/C and in 1M H2SO4, and the sweep rate is 50 millivolt/seconds.