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

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...

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Bibliographic Details
Published in:Nano research 2019-05, Vol.12 (5), p.1173-1179
Main Authors: Xu, Yanchao, Cui, Xiaoqiang, Wei, Shuting, Zhang, Qinghua, Gu, Lin, Meng, Fanqi, Fan, Jinchang, Zheng, Weitao
Format: Article
Language:English
Subjects:
Alcohols
Alloy development
Alloying effects
Atomic/Molecular Structure and Spectra
Biomedicine
Biotechnology
Catalysis
Catalysts
Catalytic activity
Chemistry and Materials Science
Commercialization
Composition
Condensed Matter Physics
Dimensional stability
Electrocatalysts
Ethanol
Fuel cells
Lattice strain
Materials Science
Nanotechnology
Nanowires
Oxidation
Platinum
Platinum base alloys
Plutonium base alloys
Research Article
Zinc
Zinc base alloys
Zinc plating
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Summary: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 Pt 94 Zn 6 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.
ISSN:1998-0124
1998-0000
DOI:10.1007/s12274-019-2374-z