Tuning Surface Structure and Strain in Pd-Pt Core-Shell Nanocrystals for Enhanced Electrocatalytic Oxygen Reduction

Yalin Xiong; Hao Shan; Zhengnan Zhou; Yucong Yan; Wenlong Chen; Yaxiong Yang; Yongfeng Liu; He Tian; Jianbo Wu; Hui Zhang; Deren Yang

doi:10.1002/smll.201603423

Tuning Surface Structure and Strain in Pd-Pt Core-Shell Nanocrystals for Enhanced Electrocatalytic Oxygen Reduction

Small. 2017 Feb;13(7). doi: 10.1002/smll.201603423. Epub 2016 Nov 18.

Authors

Yalin Xiong¹, Hao Shan², Zhengnan Zhou¹, Yucong Yan¹, Wenlong Chen², Yaxiong Yang¹, Yongfeng Liu¹, He Tian¹, Jianbo Wu², Hui Zhang¹, Deren Yang¹

Affiliations

¹ State Key Laboratory of Silicon Materials and Center of Electron Microscopy, School of Materials Science & Engineering, Zhejiang University, Hangzhou, Zhejiang, 310027, P. R. China.
² State Key Laboratory of Metal Matrix Composites, School of Materials Science & Engineering, Shanghai Jiao Tong University, Shanghai, 200240, P. R. China.

PMID: 27860266
DOI: 10.1002/smll.201603423

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.

Keywords: Pd@Pt core-shell nanocrystals; Pt ultrathin shells; oxygen reduction reaction; surface strain; surface structures.

Publication types

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