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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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Gries, Thomas
in Cooperation with on an Cooperation-Score of 37%
Topics
Publications (19/19 displayed)
- 2024High quality ZnMgAlO thin films by ultrasonic spray pyrolysis: tuning of optoelectronic properties for use as TCO, window layer, and buffer layer in all-oxide solar cellscitations
- 2024ZnMgO Thin Films by Ultrasonic Spray Pyrolysis: Modulation of Optical and Electrical Properties by Post‐annealing and Magnesium Compositioncitations
- 2023Carbon Rovings as Strain Sensor in TRC Structures: Effect of Roving Cross-Sectional Shape and Coating Material on the Electrical Response under Bending Stresscitations
- 2022Multiple assembly strategies for silica aerogel-fiber combinations – a reviewcitations
- 2021Enhanced photoelectrocatalytic hydrogen evolution using off-stoichiometry La 0.43 FeO y filmscitations
- 2021Effect of the precursor concentration on structural properties of ZnO thin films by ultrasonic spray pyrolysis
- 2021Elaboration of high-transparency ZnO thin films by ultrasonic spray pyrolysis with fast growth ratecitations
- 2020Influence of transcrystalline layer on finite element mesoscale modeling of polyamide 6 based single polymer laminate compositescitations
- 2020Influence of transcrystalline layer on finite element mesoscale modeling of polyamide 6 based single polymer laminate compositescitations
- 2020Influence of transcrystalline layer on finite element mesoscale modeling of polyamide 6 based single polymer laminate compositescitations
- 2020Experimental and numerical studies of process variabilities in biaxial carbon fiber braids
- 2020Heterostructured g-CN/TiO 2 Photocatalysts Prepared by Thermolysis of g-CN/MIL-125(Ti) Composites for Efficient Pollutant Degradation and Hydrogen Productioncitations
- 2018Development of a Polymer-Based Biodegradable Neurovascular Stent Prototypecitations
- 2014Determining electron temperature and electron density in moderate pressure H-2/CH4 microwave plasmacitations
- 2014Local modification of the microstructure and electrical properties of multifunctional Au-YSZ nanocomposite thin films by laser interference patterningcitations
- 2013Plasma-surface interaction in heptanecitations
- 2012Influence of laser interference patterning on microstructure and friction behavior of gold/yttria-stabilized zirconia nanocomposite thin filmscitations
- 2011Processing and characterization of braided NiTi microstents for medical applications
- 2011Hybrid Fabrics as Cement Matrix Reinforcement
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article
Enhanced photoelectrocatalytic hydrogen evolution using off-stoichiometry La 0.43 FeO y films
Abstract
International audience ; In this work, the influence of the stoichiometry of LaxFeOy films on their activity for H2 production by photoelectrochemical (PEC) water splitting was investigated. Thin LaxFeOy films were deposited on electrodes by magnetron co-sputtering and their composition was controlled by adjusting the power applied on metallic iron and lanthanum targets. The highest photoactivity was observed for La0.43FeOy films. The crystallization of these films and their photocatalytic activity were further improved by oxidation in an external furnace at 650 °C for 2 h. Transmission electron microscopy (TEM) analyses confirm the formation of LaFeO3 crystallites in the film and show a thin continuous polycrystalline Fe2O3 layer at the surface. The presence of Fe2O3 at the upper surface originates from an exsolution mechanism typically observed for non-stoichiometric perovskites. The improvement of the photocatalytic properties by adjusting the stoichiometry, the oxidation temperature and the film thickness was confirmed by H2 production measurements performed by mass spectrometry. We observe a large increase in H2 production rate (103%) by comparison with a stoichiometric LaFeO3 thin film. The improvement in catalytic performances for these non-stoichiometric films composed of earth abundant, low-cost and non-toxic elements, make them of high interest materials for photoelectrodes in PEC water splitting systems.