Stephenson, J, Celorrio, V, Tiwari, D et al. (3 more authors) (2018) Photoelectrochemical properties of BiOCl microplatelets. Journal of Electroanalytical Chemistry, 819. pp. 171-177. ISSN 1572-6657
Abstract
The photoelectrochemical properties of highly crystalline and phase-pure BiOCl microplatelets synthesised via a room temperature ionic liquid method are reported. X-ray crystallography reveals a tetragonal BiOCl phase, while high resolution electron microscopy shows sheet-like structures with a cross section of approximately 5 μm and thickness in the range of 500 nm. Diffuse reflectance spectroscopy shows a direct bandgap transition at 3.34 eV. Electrochemical measurements of as-prepared BiOCl powders deposited onto fluorine-doped tin oxide electrodes show a sharp cathodic current at − 0.10 V vs RHE at pH 10, which is linked to electron injection into the conduction band edge. Photoelectrochemical measurements in the presence of Na₂SO₃ as hole-acceptor in solution exhibit a strong potential dependence, switching from cathodic to anodic photocurrents at potentials around 0.70 V vs RHE. The positive photocurrent is associated with SO₃²⁻ oxidation, while the unexpected negative photocurrents are linked to cathodic material decomposition.
Metadata
Item Type: | Article |
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Authors/Creators: |
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Copyright, Publisher and Additional Information: | © 2017 The Authors. Published by Elsevier B.V. This is an open access article under the terms of the Creative Commons Attribution License (CC-BY 4.0), which permits unrestricted use, distribution and reproduction in any medium, provided the original work is properly cited. To view a copy of this license, visit http://creativecommons.org/licenses/by/4.0/. |
Dates: |
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Institution: | The University of Leeds |
Academic Units: | The University of Leeds > Faculty of Engineering & Physical Sciences (Leeds) > School of Chemistry (Leeds) > Inorganic Chemistry (Leeds) |
Depositing User: | Symplectic Publications |
Date Deposited: | 03 Nov 2017 16:21 |
Last Modified: | 12 Jul 2018 08:24 |
Status: | Published |
Publisher: | Elsevier |
Identification Number: | 10.1016/j.jelechem.2017.10.024 |
Open Archives Initiative ID (OAI ID): | oai:eprints.whiterose.ac.uk:123387 |
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