▎ 摘　　要

Highly dispersed PtCo bimetallic nanoparticles (NPs) were fabricated on reduced graphene oxide (RGO) through microwave irradiation. These PtCo bimetallic NPs showed significantly improved performance for the oxidation of glycerol compared to that of Pt/RGO and Co/RGO. Both the conversion of glycerol (70.2%) and the selectivity of free glyceric acid (GLYA, 85.9%) over PtCo/RGO were obviously higher than that of monometallic Pt/RGO and Co/RGO. Characterizations disclosed that RGO was a superior support for the growth of ultrafine Pt- based NPs, and the dispersion of Pt can be further improved by doping Pt with Co. Moreover, PtCo bimetallic NPs were more aggregation- resisted in comparison to monometallic Pt on the surface of RGO, and it can be reused for 5 runs without obvious deactivation. It was concluded that the strong electrical interaction between Pt and Co in PtCo/RGO might accelerate the oxidation of glycerol, and bimetallic PtCo can hinder the further oxidation of intermediates to C1 byproducts, and thus accelerate the conversion of glycerol and increase the selectivity toward GLYA.