| 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
Atomistic Insights into Activation and Degradation of La0.6Sr0.4CoO3-δElectrocatalysts under Oxygen Evolution Conditions
Abstract
<p>The stability of perovskite oxide catalysts for the oxygen evolution reaction (OER) plays a critical role in their applicability in water splitting concepts. Decomposition of perovskite oxides under applied potential is typically linked to cation leaching and amorphization of the material. However, structural changes and phase transformations at the catalyst surface were also shown to govern the activity of several perovskite electrocatalysts under applied potential. Hence, it is crucial for the rational design of durable perovskite catalysts to understand the interplay between the formation of active surface phases and stability limitations under OER conditions. In the present study, we reveal a surface-dominated activation and deactivation mechanism of the prominent electrocatalyst La0.6Sr0.4CoO3-δ under steady-state OER conditions. Using a multiscale microscopy and spectroscopy approach, we identify the evolving Co-oxyhydroxide as catalytically active surface species and La-hydroxide as inactive species involved in the transient degradation behavior of the catalyst. While the leaching of Sr results in the formation of mixed surface phases, which can be considered as a part of the active surface, the gradual depletion of Co from a self-assembled active CoO(OH) phase and the relative enrichment of passivating La(OH)3 at the electrode surface result in the failure of the perovskite catalyst under applied potential. </p>