▎ 摘　　要

A green approach for the synthesis of reduced graphene oxide (RGO) was developed using polylysine (PLL) as both the reducing and stabilizing agents. The factors that affect the reduction of GO, including pH, the ratio of PLL/GO and the reaction temperature were optimized and the degree of reduction of the RGO was determined using X-ray diffraction, Raman spectroscopy, thermogravimetric analysis, X-ray photoelectron spectroscopy, and scanning electron microscopy. The obtained RGO was then loaded with Pt-Au nanoparticles to form Pt-Au/RGO hybrids and these hybrids were used in modified electrodes to catalyze the oxidation of methanol. The hybrids demonstrated a high catalytic activity. This approach is a new practical green reduction method for the preparation of RGO for large-scale applications.