▎ 摘　　要

NOVELTY - A nitrogen-doped graphene catalyst comprises calcined nitrogen-doped graphene precursor comprising 10-89 wt.% graphite oxide raw material, 10-89 wt.% small organic molecules containing nitrogen, and 1-10 wt.% non-noble metal salts and/or hydrates. USE - Nitrogen-doped graphene catalyst is used for preparing membrane electrode (claimed) for fuel cell, metal-air battery and microbial fuel cell. ADVANTAGE - The nitrogen-doped graphene catalyst has excellent activity, and is prepared by simple and economical method. DETAILED DESCRIPTION - INDEPENDENT CLAIMS are included for the following: (i) preparation of nitrogen-doped graphene catalyst, which involves weighing graphite oxide, small organic molecule containing nitrogen and non-noble metal salt, mixing graphite oxide, small organic molecule containing nitrogen and non-noble metal salt in solvent, grinding, drying, obtaining nitrogen-doped graphite alkene, and supplying into quartz boat under protection of inert gas; and (ii) usage of nitrogen-doped graphene catalyst for forming membrane electrode by combination method, which involves forming catalyst solution by dispersing nitrogen-doped graphene catalyst using ultrasonic dispersing agent, transferring into glassy carbon electrode, providing binder comprising mixed solution of Nafion (RTM: sulfonated tetrafluoroethylene based fluoropolymer-copolymer) solution and methanol dropwise on glassy carbon electrode catalyst solution, drying at room temperature, and obtaining membrane electrode.