Pd@Pt Core–Shell Nanoparticles with Branched Dandelion‐like Morphology as Highly Efficient Catalysts for Olefin Reduction |
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| Authors: | Kasibhatta Josena Datta Dr. Kasibhatta Kumara Ramanatha Datta Dr. Manoj B. Gawande Dr. Vaclav Ranc Dr. Klára Čépe Dr. Victor Malgras Prof. Yusuke Yamauchi Prof. Rajender S. Varma Prof. Dr. Radek Zboril |
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| Affiliation: | 1. Regional Centre of Advanced Technologies and Materials, Department of Physical Chemistry, Faculty of Science, Palacky University in Olomouc, Olomouc, Czech Republic;2. World Premier International (WPI) Research Center for Materials, Nanoarchitectonics (MANA), National Institute for Materials Science (NIMS), Ibaraki, Japan;3. Sustainable Technology Division, National Risk Management Research, Laboratory, US Environmental Protection Agency, Cincinnati, Ohio, USA |
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| Abstract: | A facile synthesis based on the addition of ascorbic acid to a mixture of Na2PdCl4, K2PtCl6, and Pluronic P123 results in highly branched core–shell nanoparticles (NPs) with a micro–mesoporous dandelion‐like morphology comprising Pd core and Pt shell. The slow reduction kinetics associated with the use of ascorbic acid as a weak reductant and suitable Pd/Pt atomic ratio (1:1) play a principal role in the formation mechanism of such branched Pd@Pt core–shell NPs, which differs from the traditional seed‐mediated growth. The catalyst efficiently achieves the reduction of a variety of olefins in good to excellent yields. Importantly, higher catalytic efficiency of dandelion‐like Pd@Pt core–shell NPs was observed for the olefin reduction than commercially available Pt black, Pd NPs, and physically admixed Pt black and Pd NPs. This superior catalytic behavior is not only due to larger surface area and synergistic effects but also to the unique micro–mesoporous structure with significant contribution of mesopores with sizes of several tens of nanometers. |
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| Keywords: | core– shell nanoparticles heterogeneous catalysis olefins palladium platinum reduction |
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