Highly Stable Molybdenum Disulfide Protected Silicon Photocathodes for Photoelectrochemical Water Splitting

King, LA ORCID: https://orcid.org/0000-0002-0772-2378, Hellstern, TR, Park, J, Sinclair, R and Jaramillo, TF (2017) Highly Stable Molybdenum Disulfide Protected Silicon Photocathodes for Photoelectrochemical Water Splitting. ACS Applied Materials and Interfaces, 9 (42). pp. 36792-36798. ISSN 1944-8244

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Official URL: https://pubs.acs.org/doi/10.1021/acsami.7b10749

Abstract

© 2017 American Chemical Society. Developing materials, interfaces, and devices with improved stability remains one of the key challenges in the field of photoelectrochemical water splitting. As a barrier to corrosion, molybdenum disulfide is a particularly attractive protection layer for photocathodes due to its inherent stability in acid, the low permeability of its basal planes, and the excellent hydrogen evolution reaction (HER) activity the MoS2 edge. Here, we demonstrate a stable silicon photocathode containing a protecting layer consisting of molybdenum disulfide, molybdenum silicide, and silicon oxide which operates continuously for two months. We make comparisons between this system and another molybdenum sulfide-silicon photocathode embodiment, taking both systems to catastrophic failure during photoelectrochemical stability measurements and exploring mechanisms of degradation. X-ray photoelectron spectroscopy and transmission electron microscopy provide key insights into the origins of stability.

Item Type:	Article
Peer-reviewed:	Yes
Date Deposited:	05 Nov 2019 09:43
Publisher:	American Chemical Society (ACS)
Additional Information:	This is an Author Accepted Manuscript of an article published in ACS Applied Materials and Interfaces by ACS.
Divisions:	Faculties > Science and Engineering
Subject terms:	Science & Technology, Technology, Nanoscience & Nanotechnology, Materials Science, Multidisciplinary, Science & Technology - Other Topics, Materials Science, Photoelectrochemical water splitting molybdenum disulfide, stability, photocathodes, JUNCTION SOLAR-CELL, HYDROGEN EVOLUTION, H-2 EVOLUTION, EFFICIENT, REDUCTION, DESIGN, ENERGY, LAYER, Photoelectrochemical water splitting, molybdenum disulfide, photocathodes, stability, 0904 Chemical Engineering, 0303 Macromolecular and Materials Chemistry, 0306 Physical Chemistry (incl. Structural), Nanoscience & Nanotechnology
URI:	https://e-space.mmu.ac.uk/id/eprint/624300
DOI:	https://doi.org/10.1021/acsami.7b10749
ISSN	1944-8244
e-ISSN	1944-8252

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