▎ 摘　　要

NOVELTY - Preparation of highly catalytically active nitrogen-doped graphene composite cathode involves mixing graphene and ammonium nitrate, reacting at 300-400 degrees C for 0.5-2 hours, cooling, washing, vacuum-filtering, drying at 55 degrees C, mixing resultant nitrogen-doped graphene with carbon black in the mass ratio of 1:1-1:5, adding 0.3-0.6 ml polytetrafluoroethylene, 1-2 ml ethanol and 1-2 ml deionized water, mixing, uniformly coating on both sides of graphite felt electrode pretreated with acetone solution, and calcining at 360 degrees C for 30-40 minutes. USE - Preparation of highly catalytically active nitrogen-doped graphene composite cathode used for degrading organic pollutants (claimed). ADVANTAGE - The method efficiently provides highly catalytically active nitrogen-doped graphene composite cathode with reduced consumption of energy without affecting the environment. DETAILED DESCRIPTION - Preparation of highly catalytically active nitrogen-doped graphene composite cathode involves mixing graphene as carbon source prepared by electrochemical stripping and ammonium nitrate as nitrogen source in the mass ratio of 1:1-1:10 under nitrogen atmosphere, reacting at 300-400 degrees C for 0.5-2 hours, cooling, washing, vacuum-filtering, drying at 55 degrees C, mixing resultant nitrogen-doped graphene with carbon black in the mass ratio of 1:1-1:5, adding 0.3-0.6 ml polytetrafluoroethylene, 1-2 ml ethanol and 1-2 ml deionized water, mixing, uniformly coating on both sides of graphite felt electrode pretreated with acetone solution, and calcining at 360 degrees C for 30-40 minutes. An INDEPENDENT CLAIM is included for organic pollutant degradation method, which involves carrying out degradation of organic pollutants using nitrogen-doped graphene composite cathode as cathode, and high oxygen evolution potential electrode such as dimensionally stable anode or metal oxide as anode, under control working voltage of 2.5-5 V and aeration rate of 0.5-1 L/minutes.