▎ 摘　　要

NOVELTY - An iron-nitrogen co-doped graphene nanofiber oxygen reduction catalyst comprises ferric ion modified mesoporous polyimide and three-dimensional porous graphene in mass ratio of 5-12:1. USE - Iron-nitrogen co-doped graphene nanofiber oxygen reduction catalyst. ADVANTAGE - The catalyst has excellent oxygen reduction catalytic activity under synergistic effect due to excellent dispersion of iron and nitrogen in graphene nanofibers, and pore structure and large specific surface area. DETAILED DESCRIPTION - An INDEPENDENT CLAIM is included for preparation of the iron-nitrogen co-doped graphene nanofiber oxygen reduction catalyst, which involves adding ferric ion modified mesoporous polyimide and three-dimensional porous graphene to N-methylpyrrolidone, ultrasonically dispersing, heating to 100-130 degrees C, stirring for 20-30 hours to form spinning solution, feeding spinning solution into micro-injector, performing spinning process through an electrostatic spinning machine at voltage of 18-20 kV, spinning solution flow rate of 0.2-0.6 mL/minute and receiving distance of 15-20 cm to obtain nanofiber precursor, placing nanofiber precursor in atmosphere resistance furnace, introducing argon gas and calcining at 760-820 degrees C under heating rate of 5-10 degrees C/minute for 2-4 hours.