▎ 摘　　要

NOVELTY - Preparing defect-controlled pyridine nitrogen-doped porous graphene comprises (i) ultrasonically mixing the cobalt salt, the aqueous graphene oxide solution and the ammonia water, reacting at a temperature of 60-80 degrees C, centrifuging the precipitate, and freeze-drying to obtain cobalt oxide-supported graphene oxide, (ii) heating the graphene oxide-supported graphene oxide in an inert atmosphere at a temperature of 500-700 degrees C, forming cobalt-reduced graphene oxide, cleaning and ultrasonically processing, and removing the metal, and (iii) subjecting the obtained porous graphene to nitrogen doping treatment in an ammonia gas atmosphere at a temperature of 600-800 degrees C. USE - The porous graphene is useful as fuel cell catalyst (claimed). ADVANTAGE - The porous graphene has uniform pore size distribution and uniform size, and has higher oxygen reduction catalytic performance. DETAILED DESCRIPTION - An INDEPENDENT CLAIM is also included for defect-controlled pyridine nitrogen-doped porous graphene prepared by above mentioned method.