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Sonochemically synthesized core-shell structured Au–Pd nanoparticles supported on γ-Fe2O3 particles |
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| Authors: | Hiroaki Nitani Masato Yuya Takahiro Ono Takashi Nakagawa Satoshi Seino Kenji Okitsu Yoshiteru Mizukoshi Shuichi Emura Takao A Yamamoto |
| Institution: | (1) Graduate School of Engineering, Osaka University, 2-1 Yamada-oka, Suita Osaka, 565-0871, Japan;(2) The Institute of Scientific and Industrial Research, Osaka University, Ibaraki Osaka, 567-0047, Japan;(3) Graduate School of Engineering, Osaka Prefecture University, 1-1 Gakuen-cho, Sakai Osaka, 599-8531, Japan;(4) Faculty of Engineering, Nagasaki University, 1-14 Bunkyo-machi, Nagasaki Nagasaki 852-8521, Japan |
| Abstract: | A sample of Au–Pd bimetallic nanoparticles supported on γ-Fe2O3 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-Fe2O3 and core-shell structured Au–Pd nanoparticles supported on SiO2. The present sample is a promising catalyst material which has a high catalytic activity. |
| Keywords: | nanocomposit catalyst nanostructure EXAFS sonochemically synthesis colloids three-phase mixture |
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