▎ 摘　　要

NOVELTY - Preparation of three-dimensional graphene iron-cobalt and nitrogen ternary co-doped multi-stage channels with catalytic synergistic effect by mixing polybenzimidazole (PBI) with iron salts and cobalt salts and nano-calcium carbonate, evaporating, arranging complexes into templating agent surface under inert gas protection, subjecting into pyrolysis, dehydrogenation, cyclization and carbonization to obtain iron-cobalt and nitrogen-ternary co-doped graphene and forming small holes and removing template to obtain calcium carbonate decomposition of carbon dioxide. USE - Method for preparing three-dimensional graphene with transition metal and nitrogen co-doped multi-stage channels used in fuel cell, metal air battery oxygen reduction catalyst, electrolytic water oxygen precipitation catalyst and super capacitor (claimed).