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Nano Research

Article Title

Exposing Cu-Rich {110} Active Facets in PtCu nanostars for boosting electrochemical performance toward multiple liquid fuels electrooxidation

Authors

Liping Huang, Department of Chemistry and Center for Atomic Engineering of Advanced Materials, Anhui University, Hefei 230601, China
Wei Zhang, Department of Chemistry and Shenzhen Grubbs Institute, Southern University of Science and Technology, Shenzhen 518055, China College of Civil Engineering & Mechanics, Xiangtan University, Xiangtan 411105, China
Peng Li, Department of Chemistry and Center for Atomic Engineering of Advanced Materials, Anhui University, Hefei 230601, China
Yongbo Song, Department of Chemistry and Center for Atomic Engineering of Advanced Materials, Anhui University, Hefei 230601, China
Hongting Sheng, Department of Chemistry and Center for Atomic Engineering of Advanced Materials, Anhui University, Hefei 230601, China
Yuanxin Du, Department of Chemistry and Center for Atomic Engineering of Advanced Materials, Anhui University, Hefei 230601, China
Yang-Gang Wang, Department of Chemistry and Shenzhen Grubbs Institute, Southern University of Science and Technology, Shenzhen 518055, China
Yuen Wu, Center of Advanced Nanocatalysis (CAN) and Department of Chemistry, University of Science and Technology of China, Hefei 230026, China
Xun Hong, Center of Advanced Nanocatalysis (CAN) and Department of Chemistry, University of Science and Technology of China, Hefei 230026, China
Yanhuai Ding, College of Civil Engineering & Mechanics, Xiangtan University, Xiangtan 411105, China
Xiaoyou Yuan, Department of Chemistry and Center for Atomic Engineering of Advanced Materials, Anhui University, Hefei 230601, China
Manzhou Zhu, Department of Chemistry and Center for Atomic Engineering of Advanced Materials, Anhui University, Hefei 230601, China

Keywords

element-specific, etching, crystal facet, PtCu nanostars, methanol oxidation

Abstract

In catalysis, tuning the structural composition of the metal alloy is known as an efficient way to optimize the catalytic activity. This work presents the synthesis of compositional segregated six-armed PtCu nanostars via a facile solvothermal method and their distinct composition-structure-dependent performances in electrooxidation processes. The alloy is shown to have a unique six arms with a Cu-rich dodecahedral core, mainly composed of {110} facets and exhibit superior catalytic activity toward alcohols electrooxidation compared to the hollow counterpart where Cu was selectively etched. Density functional theory (DFT) calculations suggest that the formation of hydroxyl intermediate (OH*) is crucial to detoxify CO poisoning during the electrooxidation processes. The addition of Cu is found to effectively adjust the d band location of the alloy catalyst and thus enhance the formation of *OH intermediate from water splitting, which decreases the coverage of *CO intermediate. Our work demonstrates that the unique compositional anisotropy in alloy catalyst may boost their applications in electrocatalysis and provides a methodology for the design of this type catalyst.

Graphical Abstract

Publisher

Tsinghua University Press

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