▎ 摘　　要

NOVELTY - Method comprises (i) adding transition metal salt 1 into the chitosan aqueous solution, fully stirring, adding transition metal salt-II, stirring, drying at 80-90 degrees C to obtain precursor, where the transition metal salt-I is nickel chloride, nickel acetate, ferric chloride, ferric acetate, cobalt chloride, cobalt acetate, copper chloride and copper acetate, the transition metal salt-II is zinc chloride, (ii) placing the precursor in an inert atmosphere, heating to 500-800 degrees C at a heating rate of 1-5 degrees C/minute, maintaining for 1-8 hours, cooling to obtain the metal nitrogen-doped graphene material, (iii) orderly pickling the metal nitrogen-doped graphene material, water washing, vacuum drying, heating to 900-1000 degrees C at a heating rate of 1-5 degrees C/minute, maintaining for 1-4 hours, finishing the second high temperature carbonization, and cooling. USE - The carbon material is used as catalyst in electrochemical reduction of carbon dioxide (claimed). ADVANTAGE - The method enables preparation of nitrogen-doped graphene material with high catalytic activity. DETAILED DESCRIPTION - INDEPENDENT CLAIMS are also included for: (1) atomically dispersed bimetallic site-anchored nitrogen-doped carbon material prepared by the above method; and (2) electrode for electrochemical reduction of carbon dioxide.