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

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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.

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Acknowledgements

We thank the support from National Natural Science Foundation of China (Nos. 21571001, 21372006, 21631001, and U1532141), the Ministry of Education, the Education Department of Anhui Province, and 211 Project of Anhui University. Y. G. W. gratefully acknowledges the financial support from Southern University of Science and Technolgoy (SUSTech). The calculations were performed by using the Taiyi high-performance supercomputer cluster located at SUSTech.

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  1. Liping Huang and Wei Zhang contributed equally to this work.

Authors and Affiliations

  1. Department of Chemistry and Center for Atomic Engineering of Advanced Materials, Anhui University, Hefei, 230601, China

    Liping Huang, Peng Li, Yongbo Song, Hongting Sheng, Yuanxin Du, Xiaoyou Yuan & Manzhou Zhu

  2. Department of Chemistry and Shenzhen Grubbs Institute, Southern University of Science and Technology, Shenzhen, 518055, China

    Wei Zhang & Yang-Gang Wang

  3. Center of Advanced Nanocatalysis (CAN) and Department of Chemistry, University of Science and Technology of China, Hefei, 230026, China

    Yuen Wu & Xun Hong

  4. College of Civil Engineering & Mechanics, Xiangtan University, Xiangtan, 411105, China

    Wei Zhang & Yanhuai Ding

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  1. Liping Huang
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Correspondence to Peng Li, Yang-Gang Wang or Manzhou Zhu.

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

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Huang, L., Zhang, W., Li, P. et al. Exposing Cu-Rich {110} Active Facets in PtCu nanostars for boosting electrochemical performance toward multiple liquid fuels electrooxidation. Nano Res. 12, 1147–1153 (2019). https://doi.org/10.1007/s12274-019-2367-y

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