▎ 摘　　要

NOVELTY - Graphene having a polynitrogen coordination structure, is claimed comprises 1-5 atomic layers comprising e.g. carbon, oxygen, nitrogen, hydrogen and other elements a catalytic active site comprising metal element of iron, cobalt, nickel, and the graphene has multi-nitrogen coordination transition metal and the nitrogen-to-metal coordination is 4-5. USE - The graphene is useful for electrocatalyst in the electrocatalytic reaction of CO2, O2 and formaldehyde (claimed). ADVANTAGE - The graphene has high electrocatalytic performance for carbon dioxide, oxygen and formaldehyde, easy dispersibility, easy processing and easy functioning, and is easy to realize functions of electric conduction, heat dissipation, infrared heat release and electromagnetic shielding and has comparable catalytic activity to precious metal. DETAILED DESCRIPTION - An INDEPENDENT CLAIM is also included for producing graphene having a polynitrogen coordination structure comprising (i) providing a slat and a liquid containing a graphite component, where the mass of the liquid is 30-100 times the mass of the slab containing the graphite component and liquid refers to the electrolyte in each of the following steps, (ii) sequentially placing the graphite-containing slats in different electrolytes for electrolysis and electrolysis, (iii) taking out the electrolysis system, high-speed emulsification shearing, ultrasonic dispersion, sanding machine sanding treatment ro obtain a uniform slurry, (iv) drying slurry, calcining, where the calcination atmosphere is argon, and calcininf at 800 degrees C, naturally cooling with the furnace; and # Use method of graphene having a polynitrogen coordination structure comprises dispersing graphene in a solvent, mechanically treating by shearing and sanding, coating, spraying, printing on the substrate to obtain a functional film or coating. The resulting functional film or coating has excellent acid and alkali resistance, resistant to 5M hydrochloric acid, 5 M nitric acid, no significant change after 36 hours of immersion, withstands 5M soadium hydroxide , 5M aqueous potassium hydroxide solution, no significant change after 180 hours of immersion to obtained functional film has a thickness of 10 mu m to 1 mm and surface resistance is between 1 ohm and 10 kilo ohms and resulting functional film has excellent thermal conductivity, heating to 100-120 degrees C in 30 seconds, resulting functional film has a significant electromagnetic shielding effect in the frequency range of 300-20 GHz, the effectiveness of electromagnetic shielding is 40-90dB, the thickness of the film is 40-100 microns, the functional film has a elimination property against formaldehyde, power on 20V, time 12 hours and indoor formaldehyde concentration of 12 square meters was reduced by 50%.