▎ 摘　　要

NOVELTY - Preparation of graphene oxide-polymerized metalloporphyrin core-shell coated structure composite nanocatalyst comprises adding graphene oxide (GO) into thionyl chloride, ultrasonically dispersing and dissolving in N,N-dimethylformamide under protection of nitrogen, stirring under reflux, filtering and drying to obtain acyl chloride-graphene; putting acyl chloride-graphene into N,N-dimethylformamide, ultrasonically dispersing and dissolving, adding 5,10,15,20-tetrakis-(4-aminophenyl)-manganese porphyrin (MnTAPP) and anhydrous triethylamine, slowly heating, reacting under protection of nitrogen, cooling to room temperature, adding ethanol, standing, settling, filtering, drying to obtain graphene oxide grafted solid carrier of manganese porphyrin complex (GO-MnTAPP); and adding GO-MnTAPP and p-dibromobenzene to copper salt catalyst system, adding 1,4-dioxane, heating under reflux under protection of nitrogen, reacting, cooling to room temperature, filtering, washing and drying. USE - Method for preparing graphene oxide-polymerized metalloporphyrin core-shell coated structure composite nanocatalyst used for electrocatalytic reduction of nitrobenzene (claimed). ADVANTAGE - The nanocatalyst has synergistic catalytic effect of graphene oxide polymerized metalloporphyrin, reduction potential of more than 50 mV than graphene oxide modified glassy carbon electrode, and more stable property. The electrocatalytic reduction has high efficiency.