▎ 摘　　要

NOVELTY - Method for preparing nitrogen-doped porous graphene composite catalyst loaded with metal single atom involves (i) adding hydrogen peroxide solution and a nitrogen source to a graphene oxide aqueous solution, uniformly mixing and performing hydrothermal reaction to obtain nitrogen-doped porous graphene and (ii) uniformly dispersing the obtained nitrogen-doped porous graphene in water, adding metal salt solution to obtained dispersion liquid and carrying out stirring reaction in dark environment. USE - The method is useful for preparing a nitrogen-doped porous graphene composite catalyst loaded with a metal single atom. ADVANTAGE - The method effectively simplifies the preparation process of the composite catalyst by improving the overall process flow and the reaction conditions and parameters of each key process and effectively improves the dispersibility of metal single atom and catalyst activity. DETAILED DESCRIPTION - An INDEPENDENT CLAIM is included for nitrogen-doped porous graphene composite catalyst loaded with a metal single atom prepared by the method.