| People | Locations | Statistics |
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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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Meyer, Tobias
in Cooperation with on an Cooperation-Score of 37%
Topics
Publications (12/12 displayed)
- 2024Relationship between structure and charge/orbital order in epitaxial single layer Ruddlesden–Popper manganite thin filmscitations
- 2023Composition and electronic structure of $${rm SiO}_{rm x}$$/$${rm TiO}_{rm y}$$/Al passivating carrier selective contacts on n-type silicon solar cellscitations
- 2023Composition and electronic structure of SiOx/TiOy/Al passivating carrier selective contacts on n-type silicon solar cells
- 2023Composition and electronic structure of ${rm SiO}_{rm x}$/${rm TiO}_{rm y}$/Al passivating carrier selective contacts on n-type silicon solar cellscitations
- 2023Interface-Assisted Room-Temperature Magnetoresistance in Cu-Phenalenyl-Based Magnetic Tunnel Junctionscitations
- 2022Atomistic Insights into Activation and Degradation of La0.6Sr0.4CoO3-δElectrocatalysts under Oxygen Evolution Conditionscitations
- 2022Atomistic Insights into Activation and Degradation of La0.6Sr0.4CoO3−δ Electrocatalysts under Oxygen Evolution Conditionscitations
- 2021Tracing the Boron Diffusion into a Textured Silicon Solar Cell by Combining Boron Diffusion Simulation with Experimental and Simulated Scanning Transmission Electron Beam Induced Current
- 2021Phase Transitions in a Perovskite Thin Film Studied by Environmental In Situ Heating Nano‐Beam Electron Diffractioncitations
- 2020Plasma profiling time-of-flight mass spectrometry for fast elemental analysis of semiconductor structures with depth resolution in the nanometer rangecitations
- 2019Preparation Techniques for Cross‐Section Transmission Electron Microscopy Lamellas Suitable for Investigating In Situ Silicon–Aluminum Alloying at Grain Boundaries in Multicrystalline Siliconcitations
- 2005Solid state nanocrystalline titanium oxide photovoltaic cells
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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>