▎ 摘　　要

NOVELTY - Preparing catalyst involves: (1) preparing graphene-doped polystyrene, where the volume porosity of the polystyrene is greater than or equal to 75%; (2) filling aluminum oxide sol and drying; (3) roasting; (4) preparing a gold-copper plating solution; and (5) performing two-way pulse electrodeposition of gold-copper. The catalyst is gold-copper alloy/graphene-aluminum oxide catalyst. The catalyst has a block structure. The aluminum oxide is gamma -aluminum oxide. The gold-copper alloy exists in the forms of gold-copper (I), gold-copper (II) and/or gold-copper (III). The loading amount of graphene in the catalyst is 10-20 wt.%. USE - The method is useful for preparing catalyst for preparing acrolein by oxidation of propylene (claimed). ADVANTAGE - The method prepares the catalyst with high conversion rate, selectivity and catalytic performance. The catalyst has block-shaped overall structure with excellent mass and heat transfer effects. DETAILED DESCRIPTION - Preparing catalyst involves: (1) preparing graphene-doped polystyrene, where the volume porosity of the polystyrene is greater than or equal to 75%; (2) filling aluminum oxide sol and drying; (3) roasting; (4) preparing a gold-copper plating solution; and (5) performing two-way pulse electrodeposition of gold-copper. The catalyst is gold-copper alloy/graphene-aluminum oxide catalyst. The catalyst has a block structure. The aluminum oxide is gamma -aluminum oxide. The gold-copper alloy exists in the forms of gold-copper of formula: AuCu3 (I), gold-copper of formula: AuCu (II) and/or gold-copper of formula: Au3Cu (III). The loading amount of graphene in the catalyst is 10-20 wt.%.