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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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Valov, Ilia
in Cooperation with on an Cooperation-Score of 37%
Topics
Publications (19/19 displayed)
- 2024Influence of active electrode impurity on memristive characteristics of ECM devicescitations
- 2024Influence of active electrode impurity on memristive characteristics of ECM devicescitations
- 2023Effect of electrode materials on resistive switching behaviour of NbOx-based memristive devicescitations
- 2023Effect of electrode materials on resistive switching behaviour of NbOx-based memristive devicescitations
- 2023Microwave synthesis of molybdenene from MoS2citations
- 2023Nitrogen doped zirconia (N-YSZ) : preparation, characterization and electrode processes
- 2023Electrochemical activation of molecular nitrogen at the Ir/YSZ interface
- 2021Structure‐Dependent Influence of Moisture on Resistive Switching Behavior of ZnO Thin Filmscitations
- 2019Electrochemical metallization ReRAMs (ECM) - Experiments and modellingcitations
- 2019Electrolysis of Water at Atomically Tailored Epitaxial Cobaltite Surfacescitations
- 2018Electrochemically prepared oxides for resistive switching devicescitations
- 2017Electrochemical Tantalum Oxide for Resistive Switching Memoriescitations
- 2016Stability and Degradation of Perovskite Electrocatalysts for Oxygen Evolution Reactioncitations
- 2016An EMF cell with a nitrogen solid electrolyte-on the transference of nitrogen ions in yttria-stabilized zirconia
- 2014Physical origins and suppression of Ag dissolution in $mathrm{GeS_x}$-based ECM cellscitations
- 2013Bond nature of active metal ions in SiO2-based electrochemical metallization memory cellscitations
- 2012Nanosession: Electrochemical Metallization Memories
- 2011Electrochemical metallization memories—fundamentals, applications, prospectscitations
- 2011Electrochemical activation of molecular nitrogen at the Ir/YSZ interface.citations
Places of action
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article
Electrolysis of Water at Atomically Tailored Epitaxial Cobaltite Surfaces
Abstract
<p>As complex transition-metal oxides of perovskite structures, many cobaltites are active electrocatalysts promoting oxygen evolution reaction (OER) during electrochemical water splitting. To unveil specific structure-activity relationships for electrocatalytic performance, innovative types of catalysts are required to overcome the inherent high complexity of regular powder catalysts, where thin-film technology gained significance in recent years. As we demonstrate, epitaxial La<sub>0.6</sub>Sr<sub>0.4</sub>CoO<sub>3</sub>(LSCO) thin films can be deposited with controlled bulk properties, surface structure, and stoichiometry on orthorhombic (110) NdGaO<sub>3</sub>single-crystalline substrates by pulsed-laser deposition, providing ideal model systems for this purpose. The epitaxial thin films are dense and single crystalline with sub-nanometer surface roughness and grow well oriented toward the pseudocubic [001] direction. The LSCO thin films show high activity catalyzing the OER and can carry significant current density loads exceeding 100 mA/cm<sup>2</sup>. Using these model catalysts, X-ray photoemission spectroscopy reveals the degradation of the material under these dynamic conditions, involving cation leaching and a phase transformation of the oxide. An altered surface stoichiometry as well as cobalt hydroxide formation is observed. Our results show that epitaxial model systems can be operated at large current density loads, allowing a systematic study of catalysts and their degradation under highly dynamic conditions.</p>