Sonochemically synthesized core-shell structured Au-Pd nanoparticles supported on [gamma]-Fe2O3 particles

Issue Title: Special Focus: Nanomaterials for Bio-chemical Sensors A sample of Au-Pd bimetallic nanoparticles supported on γ-Fe^sub 2^O^sub 3^ was synthesized in a sonochemically one-pot process. The structural analyses of the synthesized sample were performed by the techniques of X-ray Absorption Fine Structure (XAFS), X-ray Diffraction (XRD), Transmission Electron Microscopy (TEM) and UV-vis spectrometry. Results indicated that the synthesized sample formed a core-shell structure in which a gold core was surrounded by a thin palladium shell. The reaction rate constant for the hydrogenation of cyclohexene of the present sample showed higher value than that of Pd nanoparticles supported on γ-Fe^sub 2^O^sub 3^ and core-shell structured Au-Pd nanoparticles supported on SiO^sub 2^. The present sample is a promising catalyst material which has a high catalytic activity.[PUBLICATION ABSTRACT]