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Nano Research 2019, 12(5): 1147-1153 https://doi.org/10.1007/s12274-019-2367-y
Research Article | Issue | Published: 21 March 2019

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

Show Author's Information Liping Huang1,§,  Wei Zhang2,4,§,  Peng Li1( ),  Yongbo Song1,  Hongting Sheng1,  Yuanxin Du1,  Yang-Gang Wang2( ),  Yuen Wu3,  Xun Hong3,  Yanhuai Ding4,  Xiaoyou Yuan1,  Manzhou Zhu1( )
Department of Chemistry and Center for Atomic Engineering of Advanced Materials,Anhui University,Hefei,230601,China;
Department of Chemistry and Shenzhen Grubbs Institute,Southern University of Science and Technology,Shenzhen,518055,China;
Center of Advanced Nanocatalysis (CAN) and Department of Chemistry,University of Science and Technology of China,Hefei,230026,China;
College of Civil Engineering & Mechanics,Xiangtan University,Xiangtan,411105,China;

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

Keywords:
methanol oxidation, etching, element-specific, crystal facet, PtCu nanostars
Topics:
Binary alloysCatalysis Catalyst activityCopperDensity functional theoryElectrocatalysis EtchingPlatinum alloys
Cite this article:
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 Research, 2019, 12(5): 1147-1153. https://doi.org/10.1007/s12274-019-2367-y
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Abstract Full text Electronic supplementary material About this article

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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Electronic supplementary material
About this article

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

Show Author's information Liping Huang1,§, Wei Zhang2,4,§, Peng Li1( ), Yongbo Song1, Hongting Sheng1, Yuanxin Du1, Yang-Gang Wang2( ), Yuen Wu3, Xun Hong3, Yanhuai Ding4, Xiaoyou Yuan1, Manzhou Zhu1( )
Department of Chemistry and Center for Atomic Engineering of Advanced Materials,Anhui University,Hefei,230601,China;
Department of Chemistry and Shenzhen Grubbs Institute,Southern University of Science and Technology,Shenzhen,518055,China;
Center of Advanced Nanocatalysis (CAN) and Department of Chemistry,University of Science and Technology of China,Hefei,230026,China;
College of Civil Engineering & Mechanics,Xiangtan University,Xiangtan,411105,China;

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

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.

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

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Publication history
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Acknowledgements

Publication history

Received: 27 January 2019
Revised: 28 February 2019
Accepted: 03 March 2019
Published: 21 March 2019
Issue date: May 2019

Copyright

© Tsinghua University Press and Springer-Verlag GmbH Germany, part of Springer Nature 2019

Acknowledgements

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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