▎ 摘　　要

NOVELTY - Preparation of supported copper-palladium (CuPd) double-metal catalyst comprises taking 0.015-0.020 mol/L sodium chloropalladate (Na2PdCl4) and 0.015-0.020 mol/L copper chloride dihydrate (CuCl2.2H2O) solution, adding to flask A, and magnetic stirring to uniformly mix and obtain transparent reddish brown solution; placing prepared graphene oxide (GO) and deionized water into second flask, and sonicating to dissolve graphene oxide completely in deionized water until solution is mud yellow; adding graphene oxide aqueous solution in second flask dropwise to first flask, and uniformly mixing; using sodium hydroxide solution to adjust pH value of mixed solution in flask to 8-9; weighing 0.015-0.040 mmol citrate, dissolving in deionized water, preparing trisodium citrate solution, and standing; placing round bottom flask in oil bath for magnetic stirring, dropping trisodium citrate solution into first flask, and cooling to room temperature; and centrifuging. USE - The method is used for preparing supported copper-palladium double-metal catalyst. DETAILED DESCRIPTION - Preparation of supported copper-palladium (CuPd) double-metal catalyst comprises taking 0.015-0.020 mol/L sodium chloropalladate (Na2PdCl4) and 0.015-0.020 mol/L copper chloride dihydrate (CuCl2.2H2O) solution, adding to flask A, and magnetic stirring to uniformly mix and obtain transparent reddish brown solution; placing prepared graphene oxide (GO) and deionized water into second flask, and sonicating to dissolve graphene oxide completely in deionized water until solution is mud yellow; adding graphene oxide aqueous solution in second flask dropwise to first flask, and uniformly mixing; using sodium hydroxide solution to adjust pH value of mixed solution in flask to 8-9; weighing 0.015-0.040 mmol citrate, dissolving in deionized water, preparing trisodium citrate solution, and standing; placing round bottom flask in oil bath for magnetic stirring, dropping trisodium citrate solution into first flask, and cooling to room temperature; and centrifuging reaction liquid in centrifugal tube, slowly absorbing upper layer solution in centrifugal tube by rubber head dropper, keeping bottom of centrifugal tube precipitate, washing precipitate with deionized water, washing with absolute ethyl alcohol, and removing other organic impurities in precipitate.