Modulating fcc and hcp Ruthenium on the Surface of Palladium–Copper Alloy through Tunable Lattice Mismatch |
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| Authors: | Yancai Yao Dong Sheng He Yue Lin Xiaoqian Feng Xin Wang Peiqun Yin Xun Hong Gang Zhou Yuen Wu Yadong Li |
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| Institution: | 1. Center of Advanced Nanocatalysis, University of Science and Technology of China (CAN-USTC), Hefei, Anhui, P.R. China;2. Hefei National Laboratory for Physical Sciences at the Microscale, University of Science and Technology of China, Hefei, Anhui Province, P.R. China;3. State Key Laboratory of Chemical Resource Engineering, Beijing University of Chemical Technology, Beijing, P.R. China;4. Department of Chemistry, Tsinghua University, Beijing, P.R. China |
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| Abstract: | Herein, we report an epitaxial‐growth‐mediated method to grow face‐centered cubic (fcc) Ru, which is thermodynamically unfavorable in the bulk form, on the surface of Pd–Cu alloy. Induced by the galvanic replacement between Ru and Pd–Cu alloy, a shape transformation from a Pd–Cu@Ru core–shell to a yolk–shell structure was observed during the epitaxial growth. The successful coating of the unconventional crystallographic structure is critically dependent on the moderate lattice mismatch between the fcc Ru overlayer and PdCu3 alloy substrate. Further, both fcc and hexagonal close packed (hcp) Ru can be selectively grown through varying the lattice spacing of the Pd–Cu substrate. The presented findings provide a new synthetic pathway to control the crystallographic structure of metal nanomaterials. |
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| Keywords: | crystallographic control epitaxial growth fcc ruthenium lattice mismatch nanoparticles |
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