▎ 摘　　要

NOVELTY - Method for preparing graphene oxide-supported spherical dendritic platinum nano-composite material, involves (i) preparing graphene oxide nanosheets, adding deionized water to graphene oxide nanosheets, ultrasonically dispersing to form a suspension, sequentially adding chloroplatinic acid salt and ascorbic acid to the suspension, (ii) placing a glass container containing the obtained mixed solution in a microwave reactor, carrying out microwave heating treatment, maintaining the temperature, cooling to room temperature, repeatedly washing, and finally drying in an oven. USE - Method for preparing graphene oxide-supported spherical dendritic platinum nano-composite material (claimed). ADVANTAGE - The method overcomes the problem of easy agglomeration of platinum nano-catalyst, while overcoming the multi-step reaction and the problem of low yield. The method achieves high dispersibility of the platinum catalyst, high specific surface area and synergistic effect of platinum, and achieves high catalytic activity and stability. DETAILED DESCRIPTION - Method for preparing graphene oxide-supported spherical dendritic platinum nano-composite material, involves (i) preparing graphene oxide nanosheets by Hummer method, adding 10 mL deionized water to 10-30 mg graphene oxide nanosheets, ultrasonically dispersing for 5 minutes to form a suspension, sequentially adding 4 mL chloroplatinic acid salt having concentration of 1.0-5.0 mM and 8 mL of ascorbic acid having concentration of 15-30 mM to the suspension, (ii) placing a glass container containing the obtained mixed solution in a microwave reactor, carrying out microwave heating treatment at a power of 400-1000 W for 10-20 minutes, maintaining the temperature at 90-95 degrees C, cooling to room temperature after the completion of the reaction, repeatedly washing the product, and finally drying in an oven.