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Exposing Cu-rich {110} active facets in PtCu nanostars for boosting electrochemical performance toward multiple liquid fuels electrooxidation

Huang Liping ¹ Zhang Wei ^2,3 Li Peng ¹ ^* Song Yongbo ¹ Sheng Hongting ¹ Du Yuanxin ¹ Wang Yanggang ² ^* Wu Yuen ⁴ Hong Xun ⁴ Ding Yanhuai ³ Yuan Xiaoyou ¹ Zhu Manzhou ¹ ^*

文摘	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.
来源	Nano Research ,2019,12(5):1147-1153 【核心库】
DOI	10.1007/s12274-019-2367-y
关键词	element-specific ; etching ; crystal facet ; PtCu nanostars ; methanol oxidation
地址	1. Department of Chemistry and Center for Atomic Engineering of Advanced Materials, Anhui University, Hefei, 230601 2. Department of Chemistry and Shenzhen Grubbs Institute, Southern University of Science and Technology, Shenzhen, 518055 3. College of Civil Engineering & Mechanics, Xiangtan University, Xiangtan, 411105 4. Center of Advanced Nanocatalysis (CAN) and Department of Chemistry, University of Science and Technology of China, Hefei, 230026
语种	英文
文献类型	研究性论文
ISSN	1998-0124
学科	物理学
基金	国家自然科学基金 ; 国家教育部项目 ; the Education Department of Anhui Province ; 211 Project of Anhui University
文献收藏号	CSCD:6619171

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引证文献 4 篇

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2 Zhu Enbo Enhancement of oxygen reduction reaction activity by grain boundaries in platinum nanostructures Nano Research,2020,13(12):3310-3314
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