▎ 摘　　要

The graphene was synthesized by chemical oxidation followed by thermal exfoliation of natural graphite. The functionalized graphene (FG) was prepared by chemical treatment of the synthesized graphene. The as-synthesized graphene and FG were characterized and used as Pt support materials. The 20wt.% Pt/G and 20wt.% Pt/FG catalysts were prepared by precipitation method. The prepared catalysts were characterized for particle size using X-ray diffraction, surface morphology, electrochemical performance, and stability using cyclic voltammetry. The electrochemical surface area of the FG supported platinum catalyst was found to be more than 45% as compared to the commercial carbon supported platinum catalyst. The stability of the developed catalyst (Pt/G and Pt/FG) was significantly higher than the commercial Pt/C. The membrane electrode assembly was developed using the catalysts and tested in a PEMFC. The maximum power densities of the fuel cell were found to be 314, 426, and 455mWcm-2 using Pt/C, Pt/G, and Pt/FG, respectively.