| 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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Hilgenkamp, Hans
in Cooperation with on an Cooperation-Score of 37%
Topics
Publications (12/12 displayed)
- 2024The effect of intrinsic magnetic order on electrochemical water splittingcitations
- 2024Imaging the suppression of ferromagnetism in LaMnO3 by metallic overlayerscitations
- 2023Imaging selective magnetic patterning of Ti/LaMnO3/SrTiO3 heterostructures using scanning SQUID microscopy
- 2023Paramagnetic Nd sublattice and thickness-dependent ferromagnetism in Nd2NiMnO6 double perovskite thin filmscitations
- 2020Tailoring Vanadium Dioxide Film Orientation Using Nanosheets: a Combined Microscopy, Diffraction, Transport, and Soft X‐Ray in Transmission Studycitations
- 2020Tailoring Vanadium Dioxide Film Orientation Using Nanosheets: a Combined Microscopy, Diffraction, Transport, and Soft X‐Ray in Transmission Studycitations
- 2020Structure and magnetic properties of epitaxial CaFe2O4 thin filmscitations
- 2020Anomalous Scaling of Parasitic Capacitance in FETs with a High-K Channel Materialcitations
- 2020MoRe/YBCO Josephson junctions and π-loopscitations
- 2020Tailoring Vanadium Dioxide Film Orientation Using Nanosheets : a Combined Microscopy, Diffraction, Transport, and Soft X-Ray in Transmission Studycitations
- 2019Electrochemical metallization ReRAMs (ECM) - Experiments and modellingcitations
- 2007Magnetic effects at the interface between non-magnetic oxidescitations
Places of action
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article
The effect of intrinsic magnetic order on electrochemical water splitting
Abstract
To reach a long term viable green hydrogen economy, rational design of active oxygen evolution reaction (OER) catalysts is critical. An important hurdle in this reaction originates from the fact that the reactants are singlet molecules, whereas the oxygen molecule has a triplet ground state with parallel spin alignment, implying that magnetic order in the catalyst is essential. Accordingly, multiple experimentalists reported a positive effect of external magnetic fields on OER activity of ferromagnetic catalysts. However, it remains a challenge to investigate the influence of the intrinsic magnetic order on catalytic activity. Here, we tuned the intrinsic magnetic order of epitaxial La 0.67 Sr 0.33 MnO 3 thin film model catalysts from ferro- to paramagnetic by changing the temperature in situ during water electrolysis. Using this strategy, we show that ferromagnetic ordering below the Curie temperature enhances OER activity. Moreover, we show a slight current density enhancement upon application of an external magnetic field and find that the dependence of magnetic field direction correlates with the magnetic anisotropy in the catalyst film. Our work, thus, suggests that both the intrinsic magnetic order in La 0.67 Sr 0.33 MnO 3 films and magnetic domain alignment increase their catalytic activity. We observe no long-range magnetic order at the catalytic surface, implying that the OER enhancement is connected to the magnetic order of the bulk catalyst. Combining the effects found with existing literature, we propose a unifying picture for the spin-polarized enhancement in magnetic oxide catalysts.