Fischer-Tropsch Synthesis: Effect of Acid Vapor Pretreatment on Graphene-Supported Cobalt Catalyst

In this research, the novel carbon material graphene was selected as the support, and pretreated with acid vapors to effectively increase surface defects for more active sites while addressing the raw material loss issues caused by liquid-phase acid pretreatment methods. The Co/G(V) catalysts prepared by the impregnation method were characterized by BET, XRD, H₂-TPR, TEM, XPS, etc., to investigate the effect of different acid vapor pretreatments on their Fischer-Tropsch synthesis performance. The results show that the Co/G(HNO₃) catalyst prepared by pretreating graphene support with nitric acid vapor exhibits the largest specific surface area, pore volume, and pore diameter, higher defect degree, the highest cobalt loading, and optimal catalytic performance.