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

Rani, Ekta ; Gupta, Vandna K. ; Thasfiquzzaman, Md ; Talebi, Parisa ; Martinelli, Anna ; Niu, Yuran LU ; Zakharov, Alexei LU ; Huttula, Marko ; Patanen, Minna and Singh, Harishchandra , et al. (2022) In Journal of Catalysis 414. p.199-208
Abstract

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... (More)

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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organization
publishing date
type
Contribution to journal
publication status
published
subject
keywords
Interfacial interaction, Ni-Ag-MoS, Photocatalyst, Raman mapping, X-PEEM
in
Journal of Catalysis
volume
414
pages
10 pages
publisher
Elsevier
external identifiers
  • scopus:85138129698
ISSN
0021-9517
DOI
10.1016/j.jcat.2022.09.006
language
English
LU publication?
yes
id
d3c729fd-ddd3-436e-80be-0dde9705e63e
date added to LUP
2022-12-01 15:26:12
date last changed
2022-12-01 15:26:12
@article{d3c729fd-ddd3-436e-80be-0dde9705e63e,
  abstract     = {{<p>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 MoS<sub>2</sub> in Ni-Ag-MoS<sub>2</sub> heterostructure are unveiled through synchrotron X-PEEM and what's more, the missing interaction mechanism at the Ag-MoS<sub>2</sub> interface is probed via Raman mapping. The observed competition between the downshift of the E<sub>2g</sub><sup>1</sup> and A<sub>1g</sub> modes due to charge carrier injection and the upshift of the E<sub>2g</sub><sup>1</sup> and A<sub>1g</sub> modes due to compressive strain during reverse laser power experiment is assigned to the non-uniform growth of Ag nanoparticles, their intimate contact with MoS<sub>2</sub>, and Ag intercalated layered MoS<sub>2</sub>. The substantial improvement of the H<sub>2</sub> yield of the Ni-Ag-MoS<sub>2</sub> (∼55 μmol h<sup>−1</sup> g<sup>−1</sup>) over the pristine MoS<sub>2</sub> and the binary Ag-MoS<sub>2</sub> evidence successful bonding of Ni, Ag and MoS<sub>2</sub>. This study highlights the importance of considering both electronic coupling and strain to optically tune electromechanical properties of MoS<sub>2</sub>.</p>}},
  author       = {{Rani, Ekta and Gupta, Vandna K. and Thasfiquzzaman, Md and Talebi, Parisa and Martinelli, Anna and Niu, Yuran and Zakharov, Alexei and Huttula, Marko and Patanen, Minna and Singh, Harishchandra and Cao, Wei}},
  issn         = {{0021-9517}},
  keywords     = {{Interfacial interaction; Ni-Ag-MoS; Photocatalyst; Raman mapping; X-PEEM}},
  language     = {{eng}},
  month        = {{10}},
  pages        = {{199--208}},
  publisher    = {{Elsevier}},
  series       = {{Journal of Catalysis}},
  title        = {{Unraveling compensation between electron transfer and strain in Ni-Ag-MoS<sub>2</sub> photocatalyst}},
  url          = {{http://dx.doi.org/10.1016/j.jcat.2022.09.006}},
  doi          = {{10.1016/j.jcat.2022.09.006}},
  volume       = {{414}},
  year         = {{2022}},
}