Highly active zigzag-like Pt-Zn alloy nanowires with high-index facets for alcohol electrooxidation
| Autor: | Fanqi Meng, Qinghua Zhang, Yanchao Xu, Weitao Zheng, Shuting Wei, Xiaoqiang Cui, Jinchang Fan, Lin Gu |
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| Rok vydání: | 2019 |
| Předmět: |
Nanostructure
Materials science Alloy Nanowire 02 engineering and technology engineering.material 010402 general chemistry 021001 nanoscience & nanotechnology Condensed Matter Physics 01 natural sciences Atomic and Molecular Physics and Optics Nanomaterial-based catalyst 0104 chemical sciences Catalysis chemistry.chemical_compound Adsorption chemistry Chemical engineering Alcohol oxidation engineering General Materials Science Methanol Electrical and Electronic Engineering 0210 nano-technology |
| Zdroj: | Nano Research. 12:1173-1179 |
| ISSN: | 1998-0000 1998-0124 |
| Popis: | 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. |
| Databáze: | OpenAIRE |
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