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Amorphous MoSx-coated TiO2 nanotube arrays for enhanced electrocatalytic hydrogen evolution reaction

Version 2 2024-06-05, 12:27
Version 1 2018-07-16, 16:33
journal contribution
posted on 2024-06-05, 12:27 authored by Z Liu, X Zhang, B Wang, M Xia, S Gao, X Liu, A Zavabeti, JZ Ou, K Kalantar-Zadeh, Y Wang
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.

History

Journal

Journal of physical chemistry C

Volume

122

Pagination

12589-12597

Location

Washington, D.C.

ISSN

1932-7447

eISSN

1932-7455

Language

eng

Publication classification

C Journal article, C1 Refereed article in a scholarly journal

Copyright notice

2018, American Chemical Society

Issue

24

Publisher

American Chemical Society