| People | Locations | Statistics |
|---|---|---|
| Naji, M. |
| |
| Motta, Antonella |
| |
| Aletan, Dirar |
| |
| Mohamed, Tarek |
| |
| Ertürk, Emre |
| |
| Taccardi, Nicola |
| |
| Kononenko, Denys |
| |
| Petrov, R. H. | Madrid |
|
| Alshaaer, Mazen | Brussels |
|
| Bih, L. |
| |
| Casati, R. |
| |
| Muller, Hermance |
| |
| Kočí, Jan | Prague |
|
| Šuljagić, Marija |
| |
| Kalteremidou, Kalliopi-Artemi | Brussels |
|
| Azam, Siraj |
| |
| Ospanova, Alyiya |
| |
| Blanpain, Bart |
| |
| Ali, M. A. |
| |
| Popa, V. |
| |
| Rančić, M. |
| |
| Ollier, Nadège |
| |
| Azevedo, Nuno Monteiro |
| |
| Landes, Michael |
| |
| Rignanese, Gian-Marco |
|
Gunkel, Felix
Forschungszentrum Jülich
in Cooperation with on an Cooperation-Score of 37%
Topics
Publications (24/24 displayed)
- 2024Structural, magnetic and electrical properties of oxygendeficientLa(0.6)Sr(0.4)CoO(3-δ) thin films
- 2024Space charge governs the kinetics of metal exsolutioncitations
- 2023Separating the Effects of Band Bending and Covalency in Hybrid Perovskite Oxide Electrocatalyst Bilayers for Water Electrolysis
- 2023Enhanced metal exsolution at the non-polar (001) surfaces of multi-faceted epitaxial thin filmscitations
- 2023A High-Entropy Oxide as High-Activity Electrocatalyst for Water Oxidationcitations
- 2023A High-Entropy Oxide as High-Activity Electrocatalyst for Water Oxidationcitations
- 2022Atomistic Insights into Activation and Degradation of La0.6Sr0.4CoO3-δElectrocatalysts under Oxygen Evolution Conditionscitations
- 2022Separating the Effects of Band Bending and Covalency in Hybrid Perovskite Oxide Electrocatalyst Bilayers for Water Electrolysiscitations
- 2022A high entropy oxide as high-activity electrocatalyst for water oxidation
- 2022Quantitative Determination of Native Point‐Defect Concentrations at the ppm Level in Un‐Doped BaSnO 3 Thin Filmscitations
- 2022Atomistic Insights into Activation and Degradation of La0.6Sr0.4CoO3−δ Electrocatalysts under Oxygen Evolution Conditionscitations
- 2022Activity-Stability Relationships in Oxide Electrocatalysts for Water Electrolysiscitations
- 2021Carbonate formation lowers the electrocatalytic activity of perovskite oxides for water electrolysiscitations
- 2021Identifying Ionic and Electronic Charge Transfer at Oxide Heterointerfacescitations
- 2020SrTiO3 termination controlcitations
- 2020Effect of Cationic Interface Defects on Band Alignment and Contact Resistance in Metal/Oxide Heterojunctionscitations
- 2019Electrolysis of Water at Atomically Tailored Epitaxial Cobaltite Surfacescitations
- 2017Unraveling the enhanced Oxygen Vacancy Formation in Complex Oxides during Annealing and Growthcitations
- 2016Defect-control of conventional and anomalous electron transport at complex oxide interfacescitations
- 2016Dynamics of the metal-insulator transition of donor-doped SrTi O $_{3}$citations
- 2015Surface Termination Conversion during SrTiO$_{3}$ Thin Film Growth Revealed by X-ray Photoelectron Spectroscopycitations
- 2015The influence of the local oxygen vacancy concentration on the piezoresponse of strontium titanate thin filmscitations
- 2015Surface Termination Conversion during SrTiO3 Thin Film Growth Revealed by X-ray Photoelectron Spectroscopycitations
- 2013The role of defects at functional interfaces between polar and non-polar perovskite oxides
Places of action
| Organizations | Location | People |
|---|
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>