TY - JOUR
T1 - Photoelectrochemical properties of BiOCl microplatelets
AU - Stephenson, Julie
AU - Celorrio, Veronica
AU - Tiwari, Devendra
AU - Hall, Simon R.
AU - Green, David C.
AU - Fermin, David J.
N1 - Funding information:
J.S. thanks the School of Chemistry for awarding a PhD Studentship funded by the Engineering and Physical Science Research Council (Grant number 1247175). V.C. gratefully acknowledges the Royal Society and the UK National Academy for the support through the Newton Fellowship program (NF120002). D.T. and D.J.F. are indebted to EPSRC for financial support through the PVTEAM programme (EP/L017792). V.C. and D.J.F. also acknowledge the EPSRC support via the UK Catalysis Hub (EP/K014706/1 and EP014714/1). Electron microscopy studies were performed with equipment funded by EPSRC through the grant “Atoms to Applications” (EP/K035746/1).
PY - 2018/6/15
Y1 - 2018/6/15
N2 - 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.
AB - 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.
UR - https://www.scopus.com/pages/publications/85031432747
U2 - 10.1016/j.jelechem.2017.10.024
DO - 10.1016/j.jelechem.2017.10.024
M3 - Article
SN - 1572-6657
VL - 819
SP - 171
EP - 177
JO - Journal of Electroanalytical Chemistry
JF - Journal of Electroanalytical Chemistry
ER -