▎ 摘　　要

With L-ascorbic acid as reducing agent and GO as support, an in-situ co-reduction method was proposed for anchoring Ag-Ni alloy nanoparticles onto reduced graphene oxide (rGO) (Ag-Ni/rGO). Various of characterization instruments were utilized to characterize the morphology, structure, and composition of Ag-Ni/rGO. These characterization results revealed that Ag-Ni alloy nanoparticles with average diameter of 36.95 nm were homogeneously decorated on rGO sheets. The resultant Ag-Ni/rGO nanocomposite was highly active toward the reduction of 4-nitrophenol and methylene blue. The ferromagnetic nature of the as-prepared products makes them can be recycled and reused easily. It is believed that the enhancement of the catalytic performance is originated from the strong synergistic effect between Ag and Ni of Ag-Ni alloy nanoparticles along with enrichment of rGO to a great degree. [GRAPHICS]