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Boulahya, Khalid Muñoz Gil, Daniel Gómez Herrero, Adrián Azcondo, Teresa Amador, Ulises 2024-01-22T11:44:07Z 2024-01-22T11:44:07Z 2019 Boulahya, Khalid, et al. «Eu 2 SrCo 1.5 Fe 0.5 O 7 a New Promising Ruddlesden–Popper Member as a Cathode Component for Intermediate Temperature Solid Oxide Fuel Cells». Journal of Materials Chemistry A, vol. 7, n.o 10, 2019, pp. 5601-11. https://doi.org/10.1039/C8TA11254A. 10.1039/c8ta11254a https://hdl.handle.net/20.500.14352/94329 https://doi.org/10.1039/C8TA11254A A new oxide of the Ruddlesden–Popper series in the (Eu,Sr)n+1(Co,Fe)nO3n+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 U cm2 at 700 ºC 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. eng restricted access Eu2SrCo1.5Fe0.5O7 a new promising Ruddlesden– Popper member as a cathode component for intermediate temperature solid oxide fuel cells journal article