Quasi-1D Hyperbranched WO3 Nanostructures for Low Voltage Photoelectrochemical Water-Splitting
Di, Fonzo Fabio
Journal of Materials Chemistry A
Royal Society of Chemistry
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Balandeh, M., Mezzetti, A., Tacca, A., Leonardi, S., Marra, G., Divitini, G., Ducati, C., et al. (2015). Quasi-1D Hyperbranched WO3 Nanostructures for Low Voltage Photoelectrochemical Water-Splitting. Journal of Materials Chemistry A, 3 6110-6117. https://doi.org/10.1039/C4TA06786J
Arrays of hyperbranched high aspect ratio mesostructures are grown by pulsed laser deposition, through a self-assembly process from the gas phase. These hierarchical arrays are used successfully as photoanodes for the photoelectrochemical splitting of water, exhibit ing an onset potential as low as 0.4 V vs RHE and saturation current densities up to 1.85 mA/cm2 at 0.8 V vs RHE. While the latter is similar to the state of the art values for WO3 nanostructured photoanodes, both the onset and saturation voltages are significantly lower than any other report so far. This peculiar behavior is attributed to the hyperbranched structure and to its excellent optical and electronic properties.
M.B. and A.M. and F.D.F acknowledge financial support from European Union through projects PHOCS, ENERGY 2012- 10.2.1, Future Emerging Technologies Collaborative Project, grant N. 309223. G.D. and C.D. acknowledge funding from the ERC under grant number 259619 PHOTO EM.
European Research Council (259619)
External DOI: https://doi.org/10.1039/C4TA06786J
This record's URL: https://www.repository.cam.ac.uk/handle/1810/248848