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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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Valant, M.
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Publications (6/6 displayed)
- 2019Growth, morphology and stability of Au in contact with the Bi2Se3(0001) surfacecitations
- 2018Ageing effects on electrical resistivity of Nb-doped TiO 2 thin films deposited at a high rate by reactive DC magnetron sputteringcitations
- 2016Design of a highly photocatalytically active ZnO/CuWO 4 nanocompositecitations
- 2016Photoelectrochemical water splitting with porous α-Fe2O3 thin films prepared from Fe/Fe-oxide nanoparticlescitations
- 2014A novel approach for the preparation of textured CuO thin films from electrodeposited CuCl and CuBrcitations
- 2006A mechanism for low-temperature sinteringcitations
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article
Photoelectrochemical water splitting with porous α-Fe2O3 thin films prepared from Fe/Fe-oxide nanoparticles
Abstract
<p>We report on the photoelectrochemical (PEC) performance related to water oxidation of porous hematite (α-Fe<sub>2</sub>O<sub>3</sub>) thin films, which were prepared by spin coating of colloidal core/shell Fe/Fe-oxide nanoparticles (NPs) on fluorine-doped SnO<sub>2</sub> (FTO) substrates. Oxidation of the obtained Fe/Fe-oxide films at 600 °C, 700 °C, and 800 °C in air yielded porous α-Fe<sub>2</sub>O<sub>3</sub> thin films. The advantage of using Fe/Fe-oxide NPs is that they form stable suspensions in organic solvents and are suitable for spin coating. The highest photocurrent density of 0.75 mA/cm<sup>2</sup> at 1.23 V (vs. a reversible hydrogen electrode, RHE) was achieved with an α-Fe<sub>2</sub>O<sub>3</sub> thin film calcined at 800 °C. Incident photon-to-current conversion efficiency (IPCE) data showed that the quantum efficiency of the thin films was about 15% at 350 nm at an applied bias of 1.4 V vs. RHE. To improve the oxygen evolution reaction, we electrodeposited a Ni(OH)<sub>2</sub>/NiOOH catalyst (given as NiOOH) onto the α-Fe<sub>2</sub>O<sub>3</sub> film and achieved the reduction of onset potential from 0.85 to 0.69 V vs. RHE. Electrochemical impedance spectroscopy and open-circuit photovoltage (OCP) measurements were used to estimate the flat-band potential of the thin films.</p>