Abstract: Thermally reduced graphene oxide was pretreated consecutively in solutions of SnCl 2 in HCl and PdCl 2 in HCl. The resulting material was then plated with nickel nanoparticles under sonication to prepare Ni/ graphene nanocomposites. XRD, TEM and EDS were used to investigate the microstructure, elemental composition and the chemical plating mechanism. Results show that Sn nanoparticles are distributed evenly on the reduced graphene oxide. Pd nanoparticles are located preferentially at the edges of graphene sheets and at wrinkles in them, and are also found on some Sn nanoparticles. Ni nanoparticles are formed on the Pd nanoparticles and act as active centers for Ni growththat results in covering most of the graphene sheet after plating.