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Research Article

Highly active zigzag-like Pt-Zn alloy nanowires with high-index facets for alcohol electrooxidation

Yanchao Xu1, Xiaoqiang Cui1 ( ), Shuting Wei1, Qinghua Zhang2, Lin Gu2, Fanqi Meng2, Jinchang Fan1, Weitao Zheng1( )
State Key Laboratory of Automotive Simulation and Control,School of Materials Science and Engineering, Key Laboratory of Automobile Materials of MOE and Jilin University,Changchun,130012,China;
Laboratory of Advanced Materials and Electron Microscopy,Beijing National Laboratory for Condensed Matter Physics, Institute of Physics, Chinese Academy of Sciences,Beijing,100190,China;
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Abstract

The development of highly efficient Pt-based alloy nanocatalysts is important but remains challenging for fuel cells commercialization. Here, a new class of zigzag-like platinum-zinc (Pt-Zn) alloy nanowires (NWs) with rough surface and controllable composition is reported. The merits of anisotropic one-dimensional nanostructure, stable high-index facets and coordinatively unsaturated Pt sites endow the composition-optimal Pt94Zn6 NWs with a mass activity of 7.2 and 6.2 times higher than that of commercial Pt black catalysts toward methanol/ethanol oxidation, respectively. Alloying-induced d-band electron modulation and lattice strain effects weaken the adsorption strength of poisoning species, which originally enhances the catalytic activity of Pt-Zn NWs. This study provides a new perspective of Pt-Zn electrocatalysts with intrinsic mechanism for enhanced catalytic performance.

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Keywords

Pt-Zn nanowireszigzag-likehigh-index facetsd-band centerstrain effectsalcohol oxidation

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Nano Research
Volume 12 Issue 5,
May 2019
Pages 1173-1179
DOI: 10.1007/s12274-019-2374-z

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Cite this article:
Xu Y, Cui X, Wei S, et al. Highly active zigzag-like Pt-Zn alloy nanowires with high-index facets for alcohol electrooxidation. Nano Research, 2019, 12(5): 1173-1179. https://doi.org/10.1007/s12274-019-2374-z
Topics:
Binary alloysCatalyst activityElectrocatalystsFuel cellsNanocatalystsNanowiresPlatinum alloys

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Received: 08 January 2019
Revised: 04 March 2019
Accepted: 06 March 2019
Published: 06 April 2019
© Tsinghua University Press and Springer-Verlag GmbH Germany, part of Springer Nature 2019