▎ 摘　　要

The design and fabrication of efficient and long-lasting non-Pt anode catalysts for the methanol oxidation reac-tion (MOR) is a huge challenge in direct methanol fuel cells (DMFCs) over the decades. In this work, bimetallic palladium-molybdenum nanoparticles (NPs) support on reduced graphene oxide (rGO) with different Pd/Mo ratios (PdMo/rGO) are prepared by one pot wet chemical method. The synthesized catalysts are characterized by transmission electron microscopy (TEM), energy dispersive X-ray spectroscopy (EDS), X-ray diffraction (XRD) and X-ray photoelectron spectroscopy (XPS). The catalytic activity, anti-toxicity and stability of Pd9Mo/rGO, Pd7Mo/rGO, Pd12Mo/rGO and commercial Pd/C for MOR are compared by cyclic voltammetry, CO stripping experiment and chronoamperometry. Benefiting from strong support-metal interaction effects (SSMIE) and interaction of heterostructure of Pd and Mo, Pd9Mo/rGO exhibits the most remarkable electrocat-alytic activity and stability for MOR in alkaline electrolytes, which has the highest MOR activity (1473 mA mg-1 metal, metal refers to the metal Pd quantitatively obtained by ICP-OES), the most negative CO oxi-dation peak potential (-0.204 V) and the largest current density retention rate (42.2 % after 500 cycles of cyclic voltammetry). This study demonstrates the great potential of rGO supported Pd-based catalysts for methanol oxi-dation in alkaline media.