Modulating fcc and hcp Ruthenium on the Surface of Palladium-Copper Alloy through Tunable Lattice Mismatch

Yancai Yao; Dong Sheng He; Yue Lin; Xiaoqian Feng; Xin Wang; Peiqun Yin; Xun Hong; Gang Zhou; Yuen Wu; Yadong Li

doi:10.1002/anie.201601016

Modulating fcc and hcp Ruthenium on the Surface of Palladium-Copper Alloy through Tunable Lattice Mismatch

Angew Chem Int Ed Engl. 2016 Apr 25;55(18):5501-5. doi: 10.1002/anie.201601016. Epub 2016 Mar 24.

Authors

Yancai Yao¹, Dong Sheng He¹, Yue Lin², Xiaoqian Feng¹, Xin Wang¹, Peiqun Yin¹, Xun Hong¹, Gang Zhou³, Yuen Wu⁴, Yadong Li^{5

6}

Affiliations

¹ Center of Advanced Nanocatalysis, University of Science and Technology of China (CAN-USTC), Hefei, Anhui, 230026, P.R. China.
² Hefei National Laboratory for Physical Sciences at the Microscale, University of Science and Technology of China, Hefei, Anhui Province, 230026, P.R. China.
³ State Key Laboratory of Chemical Resource Engineering, Beijing University of Chemical Technology, Beijing, 100029, P.R. China.
⁴ Center of Advanced Nanocatalysis, University of Science and Technology of China (CAN-USTC), Hefei, Anhui, 230026, P.R. China. [email protected].
⁵ Center of Advanced Nanocatalysis, University of Science and Technology of China (CAN-USTC), Hefei, Anhui, 230026, P.R. China. [email protected].
⁶ Department of Chemistry, Tsinghua University, Beijing, 100084, P.R. China. [email protected].

PMID: 27010243
DOI: 10.1002/anie.201601016

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.

Keywords: crystallographic control; epitaxial growth; fcc ruthenium; lattice mismatch; nanoparticles.

Publication types

Research Support, Non-U.S. Gov't