▎ 摘　　要

NOVELTY - A supported bifunctional catalyst composite material comprises a carrier which is a nitrogen-doped porous carbon-modified reduced graphene oxide, and a bifunctional active support which is a combination of triiron tetroxide nanoparticles and binary sulfide such as a copper sulfide-cobalt tetrasulfide composite. The catalyst composite material is obtained from a copper-based metal organic framework/ZIF-67 composite through high-temperature carbonization and vulcanization under inert atmosphere. The copper-based metal organic framework comprises an organic ligand which is a combination of 2,5-dihydroxyterephthalic acid and pyrazine. USE - Supported bifunctional catalyst composite material. ADVANTAGE - The supported bifunctional catalyst composite material has no metal-particle dispersibility problems, and excellent catalytic activity, thermal stability, and catalytic reaction selectivity. DETAILED DESCRIPTION - An INDEPENDENT CLAIM is included for preparation of supported bifunctional catalyst composite material, which involves mixing (1) carboxylated graphene, deionized water, aniline and hydrochloric acid, ultrasonically dispersing, dripping ammonium sulfate and hydrochloric acid solution, stirring the reaction, centrifuging, washing with deionized water, and vacuum drying to obtain graphene oxide/polyaniline, adding (2) the graphene oxide/polyaniline to an aqueous solution containing copper nitrate hexahydrate, 2,5-dihydroxyterephthalic acid and pyrazine, adjusting the pH of the solution to 8-13 using sodium hydroxide aqueous solution, heating to 120-180 degrees C, stirring the reaction, filtering, washing with deionized water and ethanol, and drying under vacuum to obtain graphene oxide/polyaniline/copper-metal organic framework, adding (3) the graphene oxide/polyaniline/copper-metal organic framework to an aqueous solution comprising a cobalt salt, 2-methylimidazole and methanol, stirring the reaction, filtering, washing with methanol, and drying under vacuum to obtain graphene oxide/polyaniline/copper-metal organic framework/ZIF-67 composite, adding (4) the composite to the aqueous solution of ferric oxide nanoparticles, stirring the reaction, filtering, washing with methanol, and drying under vacuum to obtain graphene oxide/polyaniline/copper-metal organic framework/ZIF-67/iron(II,III) oxide, adding (5) the obtained composite to an ethanol solution of thioacetamide, ultrasonically dispersing, transferring to a microwave reactor, adjust the microwave power to 200-500 W, reacting for 10-30 minutes, cooling to room temperature, filtering, washing with ethanol and deionized water, drying under vacuum, and placing in a tube furnace, passing an inert gas, and carbonizing at elevated temperature.