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

被引：106

作者：

Yao, Yancai ^{[1
]}

He, Dong Sheng ^{[1
]}

Lin, Yue ^{[2
]}

Feng, Xiaoqian ^{[1
]}

Wang, Xin ^{[1
]}

Yin, Peiqun ^{[1
]}

Hong, Xun ^{[1
]}

Zhou, Gang ^{[4
]}

Wu, Yuen ^{[1
]}

Li, Yadong ^{[1
,3
]}

机构：

[1] Univ Sci & Technol China, Ctr Adv Nanocatalysis, Hefei 230026, Anhui, Peoples R China

[2] Univ Sci & Technol China, Hefei Natl Lab Phys Sci Microscale, Hefei 230026, Anhui, Peoples R China

[3] Tsinghua Univ, Dept Chem, Beijing 100084, Peoples R China

[4] Beijing Univ Chem Technol, State Key Lab Chem Resource Engn, Beijing 100029, Peoples R China

来源：

ANGEWANDTE CHEMIE-INTERNATIONAL EDITION | 2016年 / 55卷 / 18期

基金：

中国博士后科学基金; 中国国家自然科学基金;

关键词：

crystallographic control; epitaxial growth; fcc ruthenium; lattice mismatch; nanoparticles; EPITAXIAL-GROWTH; NI NANOPARTICLES; NANOSTRUCTURES; DEPENDENCE; CATALYSIS;

D O I：

10.1002/anie.201601016

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

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.

引用

页码：5501 / 5505

页数：5

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