▎ 摘　　要

NOVELTY - Preparation of boron-nitrogen co-doped porous graphene catalyst comprises adding graphene to reaction vessel, passing through water vapor and argon gas, heating to obtain porous graphene, subjecting to nitrogen doping treatment under mixed atmosphere of ammonia and argon gas to obtain nitrogen-doped porous graphene, placing to reaction container, adding boric acid, and heating under protective atmosphere. USE - The method is for preparation of boron-nitrogen co-doped porous graphene catalyst used for reducing nitrogen to ammonia (claimed). ADVANTAGE - The method uses water vapor as weak oxidant to adjust pore size of porous graphene. The catalyst exhibits excellent catalytic efficiency and stability. DETAILED DESCRIPTION - An INDEPENDENT CLAIM is included for application of the catalyst comprising adding boron-nitrogen co-doped porous graphene catalyst to carrier, placing to electrolyte solution, applying negative voltage, and passing through nitrogen gas to reduce nitrogen to ammonia.