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Relationship between the Structure and Transport Properties in the Ce1−xLaxO2−x/2 System
dc.contributor.author | Zamudio-García, Javier | |
dc.contributor.author | Porras-Vázquez, José Manuel | |
dc.contributor.author | Canales-Vázquez, J. | |
dc.contributor.author | Cabeza-Díaz, Aurelio | |
dc.contributor.author | Losilla, Enrique R. | |
dc.contributor.author | Marrero-López, David | |
dc.date.accessioned | 2021-02-25T12:07:46Z | |
dc.date.available | 2021-02-25T12:07:46Z | |
dc.date.created | 2021-02-24 | |
dc.date.issued | 2019-06-25 | |
dc.identifier.citation | Zamudio-García, J., Porras-Vázquez, J., Canales-Vázquez, J., Cabeza, A., Losilla, E., & Marrero-López, D. (2019). Relationship between the Structure and Transport Properties in the Ce1–xLaxO2–x/2 System. Inorganic Chemistry, 58(14), 9368–9377. https://doi.org/10.1021/acs.inorgchem.9b01104 | es_ES |
dc.identifier.uri | https://hdl.handle.net/10630/20991 | |
dc.description.abstract | La-doped CeO2 materials have been widely investigated for potential applications in different high-temperature electrochemical devices, such as fuel cells and ceramic membranes for hydrogen production. However, the crystal structure is still controversial, and different models based on fluorite, pyrochlore, and/or type-C structures have been considered, depending on the lanthanum content and synthesis method used. In this work, an exhaustive structural analysis of the Ce1−xLaxO2−x/2 system (0.2 < x ≤ 0.7) is performed with different techniques. The average crystal structure, studied by conventional X-ray diffraction, could be considered to be a disordered fluorite; however, the local structure, examined by electron diffraction and Raman spectroscopy, reveals a biphasic mixture of fluorite and C-type phases. The thermal and electrical properties demonstrate that the materials with x ≥ 0.4 are oxide ion proton conductors in an oxidizing atmosphere and mixed ionic electronic conductors in a reducing atmosphere. The water uptake and proton conductivity increase gradually with the increase in La content, suggesting that the formation of the C-type phase is responsible for the proton conduction in these materials. | es_ES |
dc.description.sponsorship | MINECO (RTI2018-093735-B-I00 y MAT2016-77648-R) | es_ES |
dc.language.iso | eng | es_ES |
dc.publisher | American Chemical Society | es_ES |
dc.rights | info:eu-repo/semantics/openAccess | es_ES |
dc.subject | Pilas de combustible | es_ES |
dc.subject | Catalizadores | es_ES |
dc.subject.other | Proton-conductivity | es_ES |
dc.subject.other | CeO2 | es_ES |
dc.title | Relationship between the Structure and Transport Properties in the Ce1−xLaxO2−x/2 System | es_ES |
dc.type | info:eu-repo/semantics/article | es_ES |
dc.centro | Facultad de Ciencias | es_ES |
dc.identifier.doi | 10.1021/acs.inorgchem.9b01104 | |
dc.type.hasVersion | info:eu-repo/semantics/publishedVersion | es_ES |