The direct hydrothermal deposition of cobalt-doped MoS2 onto fluorine-doped SnO2 substrates for catalysis of the electrochemical hydrogen evolution reaction

Roger, I., Moca, R., Miras, H. , Crawford, K. G., Moran, D. A.J. , Ganin, A. Y. and Symes, M. D. (2017) The direct hydrothermal deposition of cobalt-doped MoS2 onto fluorine-doped SnO2 substrates for catalysis of the electrochemical hydrogen evolution reaction. Journal of Materials Chemistry A, 5(4), pp. 1472-1480. (doi:10.1039/C6TA08287D)

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Abstract

Metal chalcogenides, and doped molybdenum sulfides in particular, have considerable potential as earth-abundant electrocatalysts for the hydrogen evolution reaction. This is especially true in the case of solar-to-hydrogen devices, where an ability to deposit these materials on transparent substrates is therefore desirable. Hydrothermal methods are perhaps the most common route by which metal chalcogenide materials suitable for the hydrogen evolution reaction are produced. Such methods are simple and scalable, but the direct hydrothermal deposition of metal chalcogenides on transparent oxide electrodes has hitherto never been reported. Such an advance would greatly facilitate the expansion of the field by removing the requirement for separate hydrothermal-synthesis and catalyst-deposition steps. In this paper, we show that the ternary chalcogenide Co2Mo9S26 can be synthesised on a fluorine-doped tin oxide substrate by hydrothermal methods directly from solutions of the simple metal salts. These films display good activity for the hydrogen evolution reaction from acid solution, achieving current densities of 10 mA cm−2 at 260 mV overpotential with a Tafel slope of 64 mV per decade. Moreover, the resulting films can be made to be translucent, a very useful property which would allow light to be transmitted through the catalyst to an underlying light-harvesting array in any solar-to-hydrogen device employing this material at the cathode.

Item Type:Articles
Status:Published
Refereed:Yes
Glasgow Author(s) Enlighten ID:Ganin, Dr Alexey and Symes, Dr Mark and Moiras, Dr Charalampos and Crawford, Mr Kevin and Moca, Ms Roberta and Moran, Dr David
Authors: Roger, I., Moca, R., Miras, H., Crawford, K. G., Moran, D. A.J., Ganin, A. Y., and Symes, M. D.
College/School:College of Science and Engineering > School of Chemistry
College of Science and Engineering > School of Engineering > Electronics and Nanoscale Engineering
Journal Name:Journal of Materials Chemistry A
Publisher:Royal Society of Chemistry
ISSN:2050-7488
ISSN (Online):2050-7496
Published Online:12 December 2016
Copyright Holders:Copyright © 2017 The Royal Society of Chemistry
First Published:First published in Journal of Materials Chemistry A 5(4): 1472-1480
Publisher Policy:Reproduced under a Creative Commons License
Data DOI:10.5525/gla.researchdata.378

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Project CodeAward NoProject NamePrincipal InvestigatorFunder's NameFunder RefLead Dept
621311Upgrading the small scale equipment base for early career researchers in the engineering and physical sciencesMiles PadgettEngineering & Physical Sciences Research Council (EPSRC)EP/K031732/1S&E P&A - PHYSICS & ASTRONOMY