Please use this identifier to cite or link to this item: https://hdl.handle.net/10356/144116
Title: Ag@MoS2 core-shell heterostructure as SERS platform to reveal the hydrogen evolution active sites of single-layer MoS2
Authors: Chen, Junze
Liu, Guigao
Zhu, Yue-zhou
Su, Min
Yin, Pengfei
Wu, Xue-jun
Lu, Qipeng
Tan, Chaoliang
Zhao, Meiting
Liu, Zhengqing
Yang, Weimin
Li, Hai
Nam, Gwang-Hyeon
Zhang, Liping
Chen, Zhenhua
Huang, Xiao
Radjenovic, Petar M.
Huang, Wei
Tian, Zhong-qun
Li, Jian-feng
Zhang, Hua
Keywords: Engineering::Materials
Issue Date: 2020
Source: Chen, J., Liu, G., Zhu, Y.-z., Su, M., Yin, P., Wu, X.-j., ... Zhang, H. (2020). Ag@MoS2 core-shell heterostructure as SERS platform to reveal the hydrogen evolution active sites of single-layer MoS2. Journal of the American Chemical Society, 142(15), 7161–7167. doi:10.1021/jacs.0c01649
Project: AcRF Tier 1 2017-T1-002-119
MOE2017-T2-1-162
MOE2016-T2-2-103
Start-Up Grant No. M4081296.070.500000
NSFC (21775127 and 21522508)
Hong Kong Branch of National Precious Metals Material Engineering Research Center (NPMM)
Grant Project No. 9380100, 9610478 and 1886921) in the City University of Hong Kong.
Journal: Journal of the American Chemical Society
Abstract: Understanding the reaction mechanism for the catalytic process is essential to the rational design and synthesis of highly efficient catalysts. MoS2 has been reported to be an efficient catalyst toward the electrochemical hydrogen evolution reaction (HER), but it still lacks direct experimental evidence to reveal the mechanism for MoS2-catalyzed electrochemical HER process at the atomic level. In this work, we develop a wet-chemical synthetic method to prepare the single-layer MoS2-coated polyhedral Ag core-shell heterostructure (Ag@MoS2) with tunable sizes as efficient catalysts for the electrochemical HER. The Ag@MoS2 core-shell heterostructures are used as ideal platforms for the real-time surface-enhanced Raman spectroscopy (SERS) study owing to the strong electromagnetic field generated in the plasmonic Ag core. The in situ SERS results provide solid Raman spectroscopic evidence proving the S-H bonding formation on the MoS2 surface during the HER process, suggesting that the S atom of MoS2 is the catalytic active site for the electrochemical HER. It paves the way on the design and synthesis of heterostructures for exploring their catalytic mechanism at atomic level based on the in situ SERS measurement.
URI: https://hdl.handle.net/10356/144116
ISSN: 1520-5126
DOI: 10.1021/jacs.0c01649
Rights: This document is the Accepted Manuscript version of a Published Work that appeared in final form in Journal of the American Chemical Society, copyright © American Chemical Society after peer review and technical editing by the publisher. To access the final edited and published work see https://doi.org/10.1021/jacs.0c01649
Fulltext Permission: embargo_20210422
Fulltext Availability: With Fulltext
Appears in Collections:MSE Journal Articles

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