University of Oulu

Rani, E., Gupta, V. K., Thasfiquzzaman, M., Talebi, P., Martinelli, A., Niu, Y., Zakharov, A., Huttula, M., Patanen, M., Singh, H., & Cao, W. (2022). Unraveling compensation between electron transfer and strain in Ni-Ag-MoS2 photocatalyst. Journal of Catalysis, 414, 199–208.

Unraveling compensation between electron transfer and strain in Ni-Ag-MoS₂ photocatalyst

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Author: Rani, Ekta1; Gupta, Vandna K.2; Thasfiquzzaman, Md1;
Organizations: 1Nano and Molecular Systems Research Unit, Faculty of Science, University of Oulu, FIN-90014, Finland
2Department of Chemistry and Chemical Engineering, Chalmers University of Technology, 412 96 Gothenburg, Sweden
3MAX IV Laboratory, Lund University, Lund 22484, Sweden
Format: article
Version: published version
Access: open
Online Access: PDF Full Text (PDF, 2.9 MB)
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Language: English
Published: Elsevier, 2022
Publish Date: 2022-10-07


Despite the boom in catalytic response via constructing interfaces, understanding interfaces’ interaction in heterostructures is still a paradox. In this work, the interaction of Ni with MoS₂ in Ni-Ag-MoS₂ heterostructure are unveiled through synchrotron X-PEEM and what’s more, the missing interaction mechanism at the Ag-MoS₂ interface is probed via Raman mapping. The observed competition between the downshift of the E2g¹ and A1g modes due to charge carrier injection and the upshift of the E2g¹ and A1g modes due to compressive strain during reverse laser power experiment is assigned to the non-uniform growth of Ag nanoparticles, their intimate contact with MoS₂, and Ag intercalated layered MoS₂. The substantial improvement of the H₂ yield of the Ni-Ag-MoS₂ (∼55 μmol h−1 g−1) over the pristine MoS₂ and the binary Ag-MoS₂ evidence successful bonding of Ni, Ag and MoS₂. This study highlights the importance of considering both electronic coupling and strain to optically tune electromechanical properties of MoS₂.

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Series: Journal of catalysis
ISSN: 0021-9517
ISSN-E: 1090-2694
ISSN-L: 0021-9517
Volume: 414
Pages: 199 - 208
DOI: 10.1016/j.jcat.2022.09.006
Type of Publication: A1 Journal article – refereed
Field of Science: 114 Physical sciences
116 Chemical sciences
Funding: Authors acknowledge Academy of Finland grant #311934, and The University of Oulu and The Academy of Finland Profi5 - project #326291. W. C. acknowledges funding provided by European Research Council (ERC) under the European Union’s Horizon 2020 research and innovation programme (Grant Agreement 101002219). Authors gratefully acknowledge the Center of Materials Analysis (CMA), University of Oulu for characterizations and Dr. J. Fernández-Catalá and Dr. R. Greco for helping with GC operations. Funding from the Knut and Alice Wallenberg Foundation (Wallenberg Academy Fellowship award, 2016-0220) is kindly acknowledged. We acknowledge MAX IV Laboratory for time on Beamline (MAXPEEM) under Proposal (20200401). Research conducted at MAX IV, a Swedish national user facility, is supported by the Swedish Research council under contract 2018-07152, the Swedish Governmental Agency for Innovation Systems under contract 2018-04969, and Formas under contract 2019-02496.
EU Grant Number: (101002219) CATCH - Cross-dimensional Activation of Two-Dimensional Semiconductors for Photocatalytic Heterojunctions
Copyright information: © 2022 The Author(s). Published by Elsevier Inc. This is an open access article under the CC BY license (