▎ 摘　　要

NOVELTY - Graphene-based nitrogen-doped hierarchical porous carbon-supported palladium catalyst comprises 0.5 pts. wt. palladium element, 99.5 pts. wt. graphene-based nitrogen-doped hierarchical porous carbon, and 6-14 pts. wt. nitrogen element, and the nitrogen element is doped in the graphene-based nitrogen-doped hierarchical porous carbon. USE - Graphene-based nitrogen-doped hierarchical porous carbon-supported palladium catalyst used for hydrorefining of crude terephthalic acid (claimed). ADVANTAGE - The graphene-based nitrogen-doped hierarchical porous carbon-supported palladium catalyst adopts the sol-gel method combined with carbonization and reduction, and solves the problems of low utilization rate of palladium (Pd) in the catalyst and poor catalyst activity, and has higher activity for hydrorefining crude terephthalic acid. DETAILED DESCRIPTION - An INDEPENDENT CLAIM is included for a method for preparing the graphene-based nitrogen-doped hierarchical porous carbon-supported palladium catalyst, which involves using graphene oxide as a structure-directing agent, using resorcinol-formaldehyde-melamine as a precursor and a nitrogen source, and using a sol-gel method to prepare a graphene-based nitrogen-doped phenolic resin, carbonizing the graphene-based nitrogen-doped phenolic resin to prepare graphene-based nitrogen-doped hierarchical porous carbon, then reducing the graphene-based nitrogen-doped hierarchical porous carbon-supported palladium precursor to obtain a graphene-based nitrogen-doped hierarchical porous carbon-supported palladium catalyst.