Nanoporous Au-Ag shell with fast kinetics: integrating chemical and plasmonic catalysis
| Autor: | Xiangji Zhou, Hailing Wang, Godfrey Okumu Barasa, Zhilin Yang, Ke Wu, Zengquan Li, Lihua Qian, Songliu Yuan, Wenpeng Yang, Xianglong Lv, Yingtao Jiang, Weimin Yang, Tianshui Yu |
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| Rok vydání: | 2017 |
| Předmět: |
Nanostructure
Materials science Nanoporous Mechanical Engineering Nanoparticle Bioengineering Nanotechnology 02 engineering and technology General Chemistry 010402 general chemistry 021001 nanoscience & nanotechnology 01 natural sciences 0104 chemical sciences Catalysis Transition metal Mechanics of Materials Molecule General Materials Science Electrical and Electronic Engineering 0210 nano-technology Polarization (electrochemistry) Plasmon |
| Zdroj: | Nanotechnology. 28(42) |
| ISSN: | 1361-6528 |
| Popis: | Nanoporous noble metals and alloys are widely utilized as efficient catalysts, because they have high surface-to-volume ratios for sufficient active sites and induce molecule polarization through plasmon excitation as well. Herein, we demonstrate one approach to fabricate nanoporous Au-Ag shell. Such material represents the dual functions serving as efficient catalysts and high-performance surface-enhanced Raman scattering substrate. In situ spectrum acquisition can track the conversion of p-nitrothiophenol to 4, 4'-dimercapto-azobenzene at ambient temperature. In particular, as a result of chemical catalysis of Ag elements and strong plasmon-molecule coupling, catalytic kinetics of nanoporous Au-Ag shell is 79.2-123.8 times faster than Au nanoparticles (NPs), and 2.2-3.3 times faster than Ag NPs. This investigation offers a route to design superior catalysts to integrate chemical and plasmonic catalysis. |
| Databáze: | OpenAIRE |
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