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Tuning Surface Structure and Strain in Pd–Pt Core–Shell Nanocrystals for Enhanced Electrocatalytic Oxygen Reduction
Author(s) -
Xiong Yalin,
Shan Hao,
Zhou Zhengnan,
Yan Yucong,
Chen Wenlong,
Yang Yaxiong,
Liu Yongfeng,
Tian He,
Wu Jianbo,
Zhang Hui,
Yang Deren
Publication year - 2017
Publication title -
small
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 3.785
H-Index - 236
eISSN - 1613-6829
pISSN - 1613-6810
DOI - 10.1002/smll.201603423
Subject(s) - icosahedral symmetry , nanocrystal , materials science , octahedron , catalysis , oxygen , shell (structure) , crystallography , oxygen reduction , epitaxy , oxygen reduction reaction , strain (injury) , phase (matter) , electrocatalyst , chemical engineering , nanotechnology , crystal structure , chemistry , electrochemistry , electrode , composite material , medicine , biochemistry , organic chemistry , layer (electronics) , engineering
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.