|
authors |
Boulahya, K; Munoz-Gil, D; Gomez-Herrero, A; Azcondo, MT; Amador, U |
|
nationality |
International |
|
journal |
JOURNAL OF MATERIALS CHEMISTRY A |
|
keywords |
OXYGEN TRACER DIFFUSION; ELECTRICAL-CONDUCTIVITY; THERMAL-EXPANSION; ELECTROCHEMICAL CHARACTERIZATION; TRANSPORT-PROPERTIES; SEEBECK COEFFICIENT; CRYSTAL-STRUCTURE; AIR-ELECTRODES; PEROVSKITE; REDUCTION |
|
abstract |
A new oxide of the Ruddlesden-Popper series in the (Eu,Sr)(n+1)(Co,Fe)(n)O3n+1 system has been isolated and structurally characterized. X-ray diffraction and electron microscopy show that polycrystalline Eu2SrCo1.5Fe0.5O7 constitutes the n = 2 member of a homologous series, the essential feature of which is the existence of two connected Co/Fe octahedral layers with a perovskite-like structure, linked by an EuO rock-salt like layer. Random distributions of 3d-metals in the perovskite blocks and interstitial and oxygen vacancies in the rock-salt layers (anti Frenkel defects) are observed by electron microscopy. Such facts are commonly associated with high electronic conduction and ionic conductivity. The electrochemical study shows that the area-specific resistance of this compound is 0.26 cm(2) at 700 degrees C in air, a value which is comparable to those of the best state-of-the-art Ruddlesden-Popper materials used as cathodes in intermediate temperature solid oxide fuel cells. |
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publisher |
ROYAL SOC CHEMISTRY |
|
issn |
2050-7488 |
|
isbn |
2050-7496 |
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year published |
2019 |
|
volume |
7 |
|
issue |
10 |
|
beginning page |
5601 |
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ending page |
5611 |
|
digital object identifier (doi) |
10.1039/c8ta11254a |
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web of science category |
Chemistry, Physical; Energy & Fuels; Materials Science, Multidisciplinary |
|
subject category |
Chemistry; Energy & Fuels; Materials Science |
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unique article identifier |
WOS:000463824300050
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