Nanoporous Au-Ag shell with fast kinetics: Integrating chemical and plasmonic catalysis

Authors

W Yang, Huazhong University of Science and TechnologyFollow
K Wu, Huazhong University of Science and Technology
W Yang, Xiamen University
H Wang, School of Physics:::University of Science and Technology:::University of Science and TechnologyFollow
X Lv, Huazhong University of Science and Technology
L Qian, Huazhong University of Science and TechnologyFollow
T Yu, Huazhong University of Science and Technology
Z Li, Huazhong University of Science and Technology
X Zhou, Huazhong University of Science and Technology
G Okumu Barasa, Huazhong University of Science and Technology
S Yuan, Huazhong University of Science and Technology
Y Jiang, University of Nevada, Las VegasFollow
Z Yang, Xiamen UniversityFollow

Document Type

Article

Publication Date

1-1-2017

Publication Title

Nanotechnology

Volume

28

Issue

42

Abstract

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. © 2017 IOP Publishing Ltd.

Language

english

Repository Citation

Yang, W., Wu, K., Yang, W., Wang, H., Lv, X., Qian, L., Yu, T., Li, Z., Zhou, X., Okumu Barasa, G., Yuan, S., Jiang, Y., Yang, Z. (2017). Nanoporous Au-Ag shell with fast kinetics: Integrating chemical and plasmonic catalysis. Nanotechnology, 28(42),
http://dx.doi.org/10.1088/1361-6528/aa8470