A comparative investigation of electrocatalysis at Pt monolayers on shape-controlled Au nanocrystals: facet effect versus strain effect

Ting-Ting Zhao; Han Wang; Xu Han; Kun Jiang; Haixin Lin; Zhaoxiong Xie; Wen-Bin Cai

doi:10.1039/C6TA06794H

A comparative investigation of electrocatalysis at Pt monolayers on shape-controlled Au nanocrystals: facet effect versus strain effect

Ting-Ting Zhao,^a Han Wang,^a Xu Han,^a Kun Jiang,^a Haixin Lin,^b Zhaoxiong Xie^b and Wen-Bin Cai*^a

* Corresponding authors

^a Shanghai Key Laboratory of Molecular Catalysis and Innovative Materials, Collaborative Innovation Center of Chemistry for Energy Materials, Department of Chemistry, Fudan University, Shanghai 200433, China
E-mail: wbcai@fudan.edu.cn

^b State Key Laboratory of Physical Chemistry of Solid Surfaces, Collaborative Innovation Center of Chemistry for Energy Materials, Department of Chemistry, Xiamen University, Xiamen 361005, China

Abstract

In order to explore how and to what extent differently shaped Au nanocrystals (NCs) as the cores may affect the electrocatalytic properties of the resulting Au@Pt catalysts; a monolayer (ML) of Pt was deposited on cubic, octahedral and rhombic dodecahedral Au nanocrystals by using the well-established galvanic redox replacement method. The as-obtained Au-NCs@Pt-ML catalysts exhibited strongly inhibited CO_ad oxidation in acidic media and a significantly enhanced ethanol oxidation reaction (EOR) in alkaline media as compared to commercial Pt/C, with an Au-shape dependent activity sequence in line with that of Pt single crystals of the corresponding orientations. Strain and facet effects were found to be jointly involved in determining the overall electrocatalytic activities at the three Au-NCs@Pt-ML catalysts, with the facet effect superimposed on the more pronounced strain effect.

This article is part of the themed collection: 2016 Journal of Materials Chemistry A HOT Papers

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https://doi.org/10.1039/C6TA06794H

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Paper

Submitted

08 Aug 2016

Accepted

02 Sep 2016

First published

02 Sep 2016

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J. Mater. Chem. A, 2016,4, 15845-15850

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A comparative investigation of electrocatalysis at Pt monolayers on shape-controlled Au nanocrystals: facet effect versus strain effect

T. Zhao, H. Wang, X. Han, K. Jiang, H. Lin, Z. Xie and W. Cai, J. Mater. Chem. A, 2016, 4, 15845 DOI: 10.1039/C6TA06794H

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Journal of Materials Chemistry A

A comparative investigation of electrocatalysis at Pt monolayers on shape-controlled Au nanocrystals: facet effect versus strain effect

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A comparative investigation of electrocatalysis at Pt monolayers on shape-controlled Au nanocrystals: facet effect versus strain effect

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