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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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Jooss, Christian
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
- 2024Scaling Behavior in the Spectral and Power Density Dependent Photovoltaic Response of Hot Polaronic Heterojunctions
- 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
- 2021Phase Transitions in a Perovskite Thin Film Studied by Environmental In Situ Heating Nano‐Beam Electron Diffractioncitations
- 2021Tailoring c-axis orientation in epitaxial Ruddlesden-Popper Pr0.5Ca1.5MnO4 filmscitations
- 2020Probing the Surface of $La_{0.6}Sr_{0.4}MnO_{3}$ in Water Vapor by In Situ Photon-In / Photon-Out Spectroscopycitations
- 2020Room-Temperature Hot-Polaron Photovoltaics in the Charge-Ordered State of a Layered Perovskite Oxide Heterojunctioncitations
- 2019In Situ Preparation of Pr1-xCaxMnO3 and La1-xSrxMnO3 Catalysts Surface for High-Resolution Environmental Transmission Electron Microscopycitations
- 2019Peroxide Yield of the (001) La0.6Sr0.4MnO3 Surface as a Bifunctional Electrocatalyst for the Oxygen Reduction Reaction and Oxygen Evolution Reaction in Alkaline Mediacitations
- 2015Current-voltage characteristics of manganite-titanite perovskite junctionscitations
- 2015Strain Driven Phase Decomposition in Ion-Beam Sputtered Pr1−XCaXMnO3 Filmscitations
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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>