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Layered lithium niobium (III) oxide - LiNbO2 as a visible-light-driven photocatalyst for H2 evolution

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Date
20/11/2018
Author
Xu, Xiaoxiang
Liu, Gang
Ni, Shuang
Irvine, John T. S.
Funder
EPSRC
The Royal Society
Grant ID
EP/K022237/1
WRMA 2012/R2
Keywords
QD Chemistry
DAS
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Abstract
The search for visible-light photocatalysts is of great significance in clean energy and environmental applications to best utilise solar radiation. Some layered semiconductor photocatalysts have been found to exhibit promising performance levels. Their superior activity has been linked to the layering within the crystal structure, which may facilitate separation of carriers and, hence the reduction and oxidation reactions. Previous investigations on layered materials focused on oxides containing early transition metal cations with d0 electronic configurations utilising ultraviolet radiation. Attempts to synthesise layered materials with visible light response have been less successful and the photoactivity of such materials is not very high. Here, we have investigated a layered semiconducting compound, LiNbO2 with nominal d2 electronic configuration (Nb3+). As a result of a sub-valence band originating from filled d orbitals, LiNbO2 exhibits visible light absorption extending to 650 nm and demonstrates interesting photocatalytic activity for hydrogen production.
Citation
Xu , X , Liu , G , Ni , S & Irvine , J T S 2018 , ' Layered lithium niobium (III) oxide - LiNbO 2 as a visible-light-driven photocatalyst for H 2 evolution ' , Journal of Physics: Energy , vol. 1 , no. 1 , 015001 . https://doi.org/10.1088/2515-7655/aad4be
Publication
Journal of Physics: Energy
Status
Peer reviewed
DOI
https://doi.org/10.1088/2515-7655/aad4be
ISSN
2515-7655
Type
Journal article
Rights
Copyright © 2018 The Author(s). Published by IOP Publishing Ltd. Original content from this work may be used under the terms of the Creative Commons Attribution 3.0 licence. Any further distribution of this work must maintain attribution to the author(s) and the title of the work, journal citation and DOI.
Description
We thank the Engineering and Physical Sciences Research Council (EPSRC EP/K006800/1, EP/K022237/1) and Anglo American Platinum for financial support and the Royal Society for a Wolfson Merit Award.
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  • University of St Andrews Research
URI
http://hdl.handle.net/10023/16526

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