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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 SO3 2 − oxidation, while the unexpected negative photocurrents are linked to cathodic material decomposition.
Original language | English |
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Pages (from-to) | 171-177 |
Number of pages | 7 |
Journal | Journal of Electroanalytical Chemistry |
Volume | 819 |
Early online date | 11 Oct 2017 |
DOIs | |
Publication status | Published - 15 Jun 2018 |
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Dive into the research topics of 'Photoelectrochemical properties of BiOCl microplatelets'. Together they form a unique fingerprint.Projects
- 1 Finished
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In-situ probing structure and electronic properties of transition metal oxide electrocatalysts
Fermin, D. J. (Principal Investigator)
1/09/15 → 31/08/17
Project: Research