Nonstoichiometry, Defect Chemistry and Oxygen Transport in Fe-Doped Layered Double Perovskite Cobaltite PrBaCo2−xFexO6−δ (x = 0–0.6) Membrane Materials

Mixed conducting cobaltites PrBaCo2−xFexO6−δ (x = 0–0.6) with a double perovskite structure are promising materials for ceramic semi-permeable membranes for oxygen separation and purification due to their fast oxygen exchange and diffusion capability. Here, we report the results of the detailed stud...

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Bibliographic Details
Published in:Membranes (Basel) 2022-11, Vol.12 (12), p.1200
Main Authors: Ivanov, Ivan L., Zakiryanov, Petr O., Sereda, Vladimir V., Mazurin, Maxim O., Malyshkin, Dmitry A., Zuev, Andrey Yu, Tsvetkov, Dmitry S.
Format: Article
Language:English
Subjects:
activation energy
chemical diffusion
Chemistry
defect chemistry
Defects
Diffusion rate
Doping
Glycerol
High temperature
Iron
Membranes
Oxygen
Oxygen exchange
Permeability
Perovskite structure
Perovskites
point defects
self-diffusion
Solid oxide fuel cells
surface exchange
Transport properties
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Summary:Mixed conducting cobaltites PrBaCo2−xFexO6−δ (x = 0–0.6) with a double perovskite structure are promising materials for ceramic semi-permeable membranes for oxygen separation and purification due to their fast oxygen exchange and diffusion capability. Here, we report the results of the detailed study of an interplay between the defect chemistry, oxygen nonstoichiometry and oxygen transport in these materials as a function of iron doping. We show that doping leads to a systematic variation of both the thermodynamics of defect formation reactions and oxygen transport properties. Thus, iron doping can be used to optimize the performance of mixed conducting oxygen-permeable double perovskite membrane materials.
ISSN:2077-0375
2077-0375
DOI:10.3390/membranes12121200