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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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Castelli, Ivano Eligio
Technical University of Denmark
in Cooperation with on an Cooperation-Score of 37%
Topics
Publications (19/19 displayed)
- 2024Exploring the electronic properties and oxygen vacancy formation in SrTiO3 under straincitations
- 2023Structural and electronic properties of double wall MoSTe nanotubescitations
- 2023Transformations of 2D to 3D Double-Perovskite Nanoplates of Cs2AgBiBr6 Compositioncitations
- 2022Rational Catalyst Design for Higher Propene Partial Electro-oxidation Activity by Alloying Pd with Aucitations
- 2022Bandgap prediction of metal halide perovskites using regression machine learning modelscitations
- 2021Band structure of MoSTe Janus nanotubescitations
- 2021Band structure of MoSTe Janus nanotubescitations
- 2020Machine-learning structural and electronic properties of metal halide perovskites using a hierarchical convolutional neural networkcitations
- 2019High-Entropy Alloys as a Discovery Platform for Electrocatalysiscitations
- 2019Fe-Doping in Double Perovskite PrBaCo2(1-x)Fe2xO6-δ: Insights into Structural and Electronic Effects to Enhance Oxygen Evolution Catalyst Stabilitycitations
- 2018Highly Active Nanoperovskite Catalysts for Oxygen Evolution Reaction: Insights into Activity and Stability of Ba0.5Sr0.5Co0.8Fe0.2O2+δ and PrBaCo2O5+δcitations
- 2018Computational Screening of Light-absorbing Materials for Photoelectrochemical Water Splittingcitations
- 2017Anisotropic Proton and Oxygen Ion Conductivity in Epitaxial Ba2In2O5 Thin Filmscitations
- 2017Anisotropic Proton and Oxygen Ion Conductivity in Epitaxial Ba 2 In 2 O 5 Thin Filmscitations
- 2015Band-gap engineering of functional perovskites through quantum confinement and tunnelingcitations
- 2013Computational Screening of Materials for Water Splitting Applications
- 2013Bandgap Engineering of Double Perovskites for One- and Two-photon Water Splittingcitations
- 2013Stability and bandgaps of layered perovskites for one- and two-photon water splittingcitations
- 2012Computational screening of perovskite metal oxides for optimal solar light capturecitations
Places of action
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article
Highly Active Nanoperovskite Catalysts for Oxygen Evolution Reaction: Insights into Activity and Stability of Ba0.5Sr0.5Co0.8Fe0.2O2+δ and PrBaCo2O5+δ
Abstract
It is shown that producing PrBaCo<sub>2</sub>O<sub>5+δ</sub> and Ba<sub>0.5</sub>Sr<sub>0.5</sub>Co<sub>0.8</sub>Fe<sub>0.2</sub>O<sub>2+δ</sub>nanoparticle by a scalable synthesis method leads to high massactivities for the oxygen evolution reaction (OER) with outstandingimprovements by 10× and 50×, respectively, compared to those preparedvia the state‐of‐the‐art synthesis method. Here, detailed comparisons atboth laboratory and industrial scales show that Ba<sub>0.5</sub>Sr<sub>0.5</sub>Co<sub>0.8</sub>Fe<sub>0.2</sub>O<sub>2+δ</sub> appears to be the most active and stable perovskite catalyst under alkaline conditions, while PrBaCo<sub>2</sub>O<sub>5+δ</sub>reveals thermodynamic instability described by the density‐functionaltheory based Pourbaix diagrams highlighting cation dissolution under OERconditions. <i>Operando</i> X‐ray absorption spectroscopy is used inparallel to monitor electronic and structural changes of the catalystsduring OER. The exceptional BSCF functional stability can be correlatedto its thermodynamic meta‐stability under OER conditions as highlightedby Pourbaix diagram analysis. BSCF is able to dynamicallyself‐reconstruct its surface, leading to formation of Co‐basedoxy(hydroxide) layers while retaining its structural stability.Differently, PBCO demonstrates a high initial OER activity while itundergoes a degradation process considering its thermodynamicinstability under OER conditions as anticipated by its Pourbaix diagram.Overall, this work demonstrates a synergetic approach of using bothexperimental and theoretical studies to understand the behavior ofperovskite catalysts.