title: Tuning Surface Structure and Strain in Pd-Pt Core-Shell Nanocrystals for Enhanced Electrocatalytic Oxygen Reduction.
abstract: Icosahedral, octahedral, and cubic Pd@Pt core-shell nanocrystals with two atomic Pt layers are epitaxially generated under thermodynamic control. Such icosahedra exhibit remarkably enhanced catalytic properties for oxygen reduction reaction compared to the octahedra and cubes as well as commercial Pt/C, which can be attributed to ligand and geometry effects, especially twin-induced strain effect that is revealed by geometrical phase analysis.
authors.affiliation: State Key Laboratory of Silicon Materials and Center of Electron Microscopy, School of Materials Science & Engineering, Zhejiang University, Hangzhou, Zhejiang, 310027, P. R. China.
authors.forename: Yalin
authors.initials: Y
authors.lastname: Xiong
authors.affiliation: State Key Laboratory of Metal Matrix Composites, School of Materials Science & Engineering, Shanghai Jiao Tong University, Shanghai, 200240, P. R. China.
authors.forename: Hao
authors.initials: H
authors.lastname: Shan
authors.affiliation: State Key Laboratory of Silicon Materials and Center of Electron Microscopy, School of Materials Science & Engineering, Zhejiang University, Hangzhou, Zhejiang, 310027, P. R. China.
authors.forename: Zhengnan
authors.initials: Z
authors.lastname: Zhou
authors.affiliation: State Key Laboratory of Silicon Materials and Center of Electron Microscopy, School of Materials Science & Engineering, Zhejiang University, Hangzhou, Zhejiang, 310027, P. R. China.
authors.forename: Yucong
authors.initials: Y
authors.lastname: Yan
authors.affiliation: State Key Laboratory of Metal Matrix Composites, School of Materials Science & Engineering, Shanghai Jiao Tong University, Shanghai, 200240, P. R. China.
authors.forename: Wenlong
authors.initials: W
authors.lastname: Chen
authors.affiliation: State Key Laboratory of Silicon Materials and Center of Electron Microscopy, School of Materials Science & Engineering, Zhejiang University, Hangzhou, Zhejiang, 310027, P. R. China.
authors.forename: Yaxiong
authors.initials: Y
authors.lastname: Yang
authors.affiliation: State Key Laboratory of Silicon Materials and Center of Electron Microscopy, School of Materials Science & Engineering, Zhejiang University, Hangzhou, Zhejiang, 310027, P. R. China.
authors.forename: Yongfeng
authors.initials: Y
authors.lastname: Liu
authors.affiliation: State Key Laboratory of Silicon Materials and Center of Electron Microscopy, School of Materials Science & Engineering, Zhejiang University, Hangzhou, Zhejiang, 310027, P. R. China.
authors.forename: He
authors.initials: H
authors.lastname: Tian
authors.affiliation: State Key Laboratory of Metal Matrix Composites, School of Materials Science & Engineering, Shanghai Jiao Tong University, Shanghai, 200240, P. R. China.
authors.forename: Jianbo
authors.initials: J
authors.lastname: Wu
authors.affiliation: State Key Laboratory of Silicon Materials and Center of Electron Microscopy, School of Materials Science & Engineering, Zhejiang University, Hangzhou, Zhejiang, 310027, P. R. China.
authors.forename: Hui
authors.initials: H
authors.lastname: Zhang
authors.affiliation: State Key Laboratory of Silicon Materials and Center of Electron Microscopy, School of Materials Science & Engineering, Zhejiang University, Hangzhou, Zhejiang, 310027, P. R. China.
authors.forename: Deren
authors.initials: D
authors.lastname: Yang
keywords: Pd@Pt core-shell nanocrystals; Pt ultrathin shells; oxygen reduction reaction; surface strain; surface structures