▎ 摘　　要

NOVELTY - Preparing single-atom catalyst comprises (i) dispersing graphene oxide in water, (ii) dispersing organic monomers with amino groups and benzene rings in water, (iii) adding chloroplatinic acid, fully stirring and freeze-drying to obtain a powder material, and (iv) heat-treating the obtained powder material at a certain temperature to obtain a single-atom catalyst material. USE - The method is useful for preparing single-atom catalyst. ADVANTAGE - The method can reduce the preparation cost of the catalyst, can effectively disperse platinum single atoms, prevents from agglomerating, and simultaneously changes the coordination environment of the platinum material, and improves the catalytic activity of the material, solves low utilization rate of the existing noble metal platinum catalyst, only the surface sites participate in the catalytic reaction, and utilization rate is low, single-atom materials are prone to agglomeration during use and preparation through simple physical adsorption, and problem that single atoms cannot change the coordination environment of platinum materials.