| People | Locations | Statistics |
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| Naji, M. |
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| Motta, Antonella |
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| Aletan, Dirar |
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| Mohamed, Tarek |
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| Ertürk, Emre |
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| Taccardi, Nicola |
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| Kononenko, Denys |
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| Petrov, R. H. | Madrid |
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| Alshaaer, Mazen | Brussels |
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| Bih, L. |
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| Casati, R. |
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| Muller, Hermance |
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| Kočí, Jan | Prague |
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| Šuljagić, Marija |
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| Kalteremidou, Kalliopi-Artemi | Brussels |
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| Azam, Siraj |
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| Ospanova, Alyiya |
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| Blanpain, Bart |
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| Ali, M. A. |
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| Popa, V. |
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| Rančić, M. |
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| Ollier, Nadège |
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| Azevedo, Nuno Monteiro |
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| Landes, Michael |
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| Rignanese, Gian-Marco |
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Spiccia, Leone
in Cooperation with on an Cooperation-Score of 37%
Topics
Publications (15/15 displayed)
- 2017Polypyridyl Iron Complex as a Hole-Transporting Material for Formamidinium Lead Bromide Perovskite Solar Cellscitations
- 2017Dipole-field-assisted charge extraction in metal-perovskite-metal back-contact solar cellscitations
- 2017Vertically Aligned Interlayer Expanded MoS2 Nanosheets on a Carbon Support for Hydrogen Evolution Electrocatalysiscitations
- 2017A facile deposition method for CuSCN: Exploring the influence of CuSCN on J-V hysteresis in planar perovskite solar cellscitations
- 2016Solar water oxidation by multicomponent TaON photoanodes functionalized with nickel oxidecitations
- 2016Enhancing the Optoelectronic Performance of Perovskite Solar Cells via a Textured CH3NH3PbI3 Morphologycitations
- 2016Parameters responsible for the degradation of CH3NH3PbI3-based solar cells on polymer substratescitations
- 2016Enhancing the optoelectronic performance of perovskite solar cells via a textured CH3NH3PbI3 morphologycitations
- 2016Highly dispersed cobalt oxide on TaON as efficient photoanodes for long-term solar water splittingcitations
- 2014Gas-assisted preparation of lead iodide perovskite films consisting of a monolayer of single crystalline grains for high efficiency planar solar cellscitations
- 2012Electrodeposited MnOx films from ionic liquid for electrocatalytic water oxidationcitations
- 2007Recognition of thymine and related nucleosides by a ZnII-cyclen complex bearing a ferrocenyl pendant
- 2007Modification of mesoporous TiO2 electrodes by surface treatment with titanium(IV), indium(III) and zirconium(IV) oxide precursors: preparation, characterization and photovoltaic performance in dye-sensitized nanocrystalline solar cells
- 2005BaTiO3-coated TiO2 working electrodes for use in dye-sensitised solar cells
- 2000Experimental and theoretical investigations of the effect of deprotonation on electronic spectra and reversible potentials of photovoltaic sensitizerscitations
Places of action
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article
Highly dispersed cobalt oxide on TaON as efficient photoanodes for long-term solar water splitting
Abstract
<p>Photoelectrochemical water splitting into H<sub>2</sub> and O<sub>2</sub> over a semiconductor-based photocatalyst offers a promising way to achieve the sustainable harvesting and storage of solar energy. However, short diffusion lengths and inefficient separation of the charge carriers in the semiconductors following light absorption result in fast recombination of holes and electrons and eventually poor performance. Herein, we address this problem by integrating an efficient and robust water oxidation catalyst, cobalt oxide (CoO<sub>x</sub>), into screen-printed TaON photoanodes premodified with TiO<sub>2</sub> coatings for better stability. SEM, TEM, and ICP-MS analysis of the Co deposits and electrochemical techniques were used to demonstrate the advantages provided by the photoassisted CoO<sub>x</sub> electrodeposition method. Specifically, this method allows the selective and facile functionalization of the TiO<sub>2</sub>-TaON surface with a uniform layer of near-(hemi)spherical CoO<sub>x</sub> particles having a diameter of 5-15 nm. In comparison to the TiO<sub>2</sub>-TaON photoanodes, the optimized CoO<sub>x</sub>/TiO<sub>2</sub>-TaON configuration provides an enhancement in the photocurrent densities of up to 2 orders of magnitude and a substantial improvement in the long-term stability on testing in borate buffer solutions (pH 9.2). The highest oxidative photocurrent density of 0.7 mA cm<sup>-2</sup> was achieved with CoO<sub>x</sub>/TiO<sub>2</sub>-TaON under visible light irradiation (λ >400 nm; 100 mW cm<sup>-2</sup>) at 1.2 V vs reversible hydrogen electrode, and the system remained stable for at least 24 h. The Co loading in the best-performing photoanode is ca. 0.1 wt % with respect to TaON; higher and lower loadings result in poorer photocatalytic activity and stability. Comparisons of the performance of CoO<sub>x</sub>/TiO<sub>2</sub>-TaON with other representative inorganic water photoelectrooxidation systems are provided and discussed.</p>