Journal
CHEMPHYSCHEM
Volume 17, Issue 18, Pages 2813-2817Publisher
WILEY-V C H VERLAG GMBH
DOI: 10.1002/cphc.201600269
Keywords
Au nanoparticles; particle size effects; plasmonic photocatalysts; TiO2; water oxidation
Funding
- MEXT
- [15K05654]
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Mesoporous TiO2 nanocrystalline film was formed on fluorine-doped tin oxide electrode (TiO2/FTO) and gold nanoparticles (NPs) of different sizes were loaded onto the surface with the loading amount kept constant (Au/TiO2/FTO). Visible-light irradiation (lambda > 430 nm) of the Au/TiO2/FTO photoanode in a photoelectrochemical cell with the structure of photoanode vertical bar 0.1 M NaClO4 aqueous solution vertical bar Ag/AgCl (reference electrode)vertical bar glassy carbon (cathode) leads to the oxidation of water to oxygen (O-2). We show that the visible-light activity of the Au/TiO2/FTO anode increases with a decrease in Au particle size (d) at 2.9 <= d <= 11.9 nm due to the enhancement of the charge separation and increasing photoelectrocatalytic activity.
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