▎ 摘　　要

NOVELTY - Nitrogen-doped graphene copper-based double metal single atom catalyst comprises nitrogen-doped graphene load single atom copper and transition metal. The metal copper load amount in the catalyst is 0.5-6.0%. The load amount of the transition metal M is 0.1-3.0%. The transition metal M comprises chromium, iron, cobalt, nickel, manganese, vanadium and molybdenum. USE - The nitrogen-doped graphene copper-based double metal single atom catalyst is used in preparing phenol by directly oxidizing benzene (claimed). ADVANTAGE - The catalyst has a porous structure, can realize fast quality and energy transfer, the rich nitrogen atom is used as the anchoring center, which is good for anchoring, dispersing single atom copper/metal center, the high temperature processing process, large amount of nitrogen atom and metal copper/metal to form coordination effect, so as to improve the single atom copper/metal anchoring amount, single atom copper/metal species is nitrogen atom strong anchoring limiting domain on the derived nitrogen-doped graphene and no dissolving problem occurs. DETAILED DESCRIPTION - An INDEPENDENT CLAIM is also included for preparing the nitrogen-doped graphene copper-based double-metal single atom catalyst, comprising adding the soluble salt of dicyandiamide and transition metal M into graphene oxide dispersion liquid, stirring at room temperature for 10-12 hours, freezing and drying to obtain M/DCD/GO precursor, wrapping the obtained M/DCD/GO precursor with copper net into the quartz boat, under the N2 atmosphere, raising the temperature to 600degrees Celsius for 2-3 hours, processing for 1-2 hours at 800degrees Celsius, cooling to room temperature to obtain the black powder, adding H2SO4 solution to the obtained black powder, completely immersing the material, stirring at constant temperature of 60-80degrees Celsius for 10-12 hours, filtering and washing to neutral, and placing the obtained solid in a vacuum drying box to dry to obtain the catalyst.