▎ 摘　　要

NOVELTY - Preparation of palladium-supported graphene-based catalyst comprises dispersing graphite oxide in deionized water to obtain dilute graphite oxide dispersion, dispersing graphite oxide dispersion and palladium or palladium salt solution to obtain palladium-loaded graphene hydrogel, replacing solvent in palladium-loaded graphene hydrogel with deionized water and freeze-drying. USE - Method of preparing palladium-supported graphene-based catalyst (claimed). ADVANTAGE - The method reduces use of organic solvent and environmental pollution caused by organic solvent and has simple preparation process and low cost.