Amorphous MoSx-Coated TiO2 Nanotube Arrays for Enhanced Electrocatalytic Hydrogen Evolution Reaction

Liu, Z, Zhang, X, Wang, B, Xia, M, Gao, S, Liu, X, Zavabeti, A, Ou, J, Kalantar Zadeh, K and Wang, Y 2018, 'Amorphous MoSx-Coated TiO2 Nanotube Arrays for Enhanced Electrocatalytic Hydrogen Evolution Reaction', Journal of Physical Chemistry C, vol. 122, no. 24, pp. 12589-12597.


Document type: Journal Article
Collection: Journal Articles

Title Amorphous MoSx-Coated TiO2 Nanotube Arrays for Enhanced Electrocatalytic Hydrogen Evolution Reaction
Author(s) Liu, Z
Zhang, X
Wang, B
Xia, M
Gao, S
Liu, X
Zavabeti, A
Ou, J
Kalantar Zadeh, K
Wang, Y
Year 2018
Journal name Journal of Physical Chemistry C
Volume number 122
Issue number 24
Start page 12589
End page 12597
Total pages 9
Publisher American Chemical Society
Abstract Two-dimensional amorphous MoSx(a-MoSx) has been confirmed to be a highly active and economic electrocatalyst for hydrogen evolution reaction (HER). The development of its hybrid cocatalyst is envisioned to bestow more active sites with appropriate crystal engineering and modified electronic properties for enhancing catalytic performance. In this work, a composite cocatalyst comprising a-MoSx(x = 1.78) and well-ordered anodized TiO2nanotube arrays (TNAs) is successfully developed through a facile electrodeposition route. The synergistic coupling of the unique vector charge transfer effect of TNAs and proliferation of active sites in a-MoSxderived from the space confinement effect and curved interface growth of TNAs lead to a significant enhancement of HER activity, compared to those of other forms of MoS2-based electrodes that have been previously reported. The MoSx/TNAs electrode exhibits the relatively small onset overpotential of 88 mV and presents an overpotential of 157 mV at 10 mA cm-2HER current density. The composite electrodes also show an excellent stability with no performance degradation after undergoing 1000 times successive linear sweep voltammetry. The deposition of a-MoSxonto the curved sidewall in a confined space of TNAs is demonstrated to be an effective method to induce the growth of a-MoSx, leading to an enhanced catalytic activity toward HER.
Subject Functional Materials
Keyword(s) photocatalytic H-2 evolution
charge-carrier transfer
active edge sites
molybdenum sulfide
quantum dots
catalytic-activities
2-dimensional MOS2
1T phase
nanosheets
films
DOI - identifier 10.1021/acs.jpcc.8b01678
Copyright notice © 2018 American Chemical Society
ISSN 1932-7447
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