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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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Fortes, A. D.
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Publications (2/2 displayed)
- 2021Structural, magnetic and catalytic properties of a new vacancy ordered perovskite type barium cobaltate BaCoO2.67citations
- 2008Thermoelastic properties of magnesiowüstite, (Mg1−xFex)O: determination of the Anderson–Grüneisen parameter by time-of-flight neutron powder diffraction at simultaneous high pressures and temperaturescitations
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article
Structural, magnetic and catalytic properties of a new vacancy ordered perovskite type barium cobaltate BaCoO2.67
Abstract
A new vacancy ordered, anion deficient perovskite modification with composition of BaCoO<sub>2.67</sub>(Ba<sub>3</sub>Co<sub>3</sub>O<sub>8􀀀1</sub>) has been prepared via a two-step heating process. Combined Rietveld analysis of neutron and X-ray powder diffraction data shows a novel ordering of oxygen vacancies not known before for barium cobaltates. A combination of neutron powder diffraction, magnetic measurements, and density functional theory (DFT) studies confirms G-type antiferromagnetic ordering. From impedance measurements, the electronic conductivity of the order of 10<sup>-4</sup> S cm<sup>-1 </sup>is determined. Remarkably, the bifunctional catalytic activity for oxygen evolution reaction (OER)and oxygen reduction reaction (ORR) is found to be comparable to that of Ba<sub>0.5</sub>Sr<sub>0.5</sub>Co<sub>0.8</sub>Fe<sub>0.2</sub>O3<sub>–y</sub>, confirming that charge-ordered anion deficient non-cubic perovskites can be highly efficient catalysts.