▎ 摘　　要

Reduced graphene oxide (RGO) film on a glass carbon electrode (GCE) obtained by pulsed electrodeposition has been used as an effective support for the electrodeposition of Pt microspherical particles. The nucleation studies of Pt particles on the RGO film show that the RGO film is advantageous for rapid Pt nucleation and thus results in a rapid growth process of Pt compared to a bare GCE. The electrocatalytic abilities of the Pt catalysts toward methanol oxidation were investigated by cyclic voltammetry, chronoamperometry and Tafel plot, including electrochemical surface area, peak current density, the turnover number and Tafel slope. It is found that the Pt/RGO/GCE electrode has higher catalytic activity and better stability than the Pt/GCE electrode under the same conditions, which indicates that the increased electrocatalytic activity is attributed to the synergistic effect of graphene and Pt particles. The kinetic characterization of Pt/RGO/GCE for methanol electro-oxidation is further discussed.