▎ 摘　　要

NOVELTY - Hexagonal boron nitride/graphene planar heterojunction three-dimensional porous carbon material, involves using porous hexagonal boron nitride, graphene precursor, and nickel nano-microspheres as raw materials, crushing the porous hexagonal boron nitride by ball-milling process, making the edge functional groups of hexagonal boron nitride form covalent bonds with the graphene precursor under the action of mechanochemistry, adding nickel nano-microspheres as catalyst and template agent, ball-milling, pressing the mixed material into film, and removing nickel particles by annealing process and acid washing process to prepare the hexagonal boron nitride/graphene planar heterojunction three-dimensional porous carbon material, where the content of boron or nitrogen is 2-15 %mass and the pore size distribution is 10-30 nm, and the graphene precursor is a precursor containing hydroxyl and amine groups. USE - The hexagonal boron nitride/graphene planar heterojunction three-dimensional porous carbon material is used in electrocatalytic oxygen reduction reaction (claimed).