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A Reduced Graphene Oxide-Supported Pd-Ni nanocomposite (Pd1Ni4/RGO) was prepared by simultaneous chemical reduction, on the surface of which a small amount of Au nanoparticles were subsequently deposited via potentiontatic deposition to obtain an Au-deposited Pd1Ni4/RGO (denoted as Au(x)-Pd1Ni4/RGO, x = 1, 2, and 5 s, representing the deposition time of Au). As a representative, the surface structure of the Au(1s)-Pd1Ni4/RGO electrode was characterized and analyzed by scanning electron microscopy (SEM), transmission electron microscopy (TEM), energy dispersive X-ray spectrum (EDX) and X-ray diffraction (XRD), respectively. The modification approach described here is simple, effective and versatile, which can be further used to modify other metal substrates with an additional metal. Moreover, the Au deposition induces a positive effect on the electro-catalytic activity for propane-1,3-diol oxidation in alkaline media in comparison to the Pd1Ni4/RGO.

Synthesis of Au-modified Reduced Graphene Oxide Supported Pd-Ni nanocomposites and electrocatalytic activity for propane- 1,3-diol oxidation