Comparison of the local and the average crystal structure of proton conducting lanthanum tungstate and the influence of molybdenum substitution
We report on the comparison of the local and average structure reported recently for proton conducting lanthanum tungstate, of general formula La28−xW4+xO54+δv2−δ, and the impact of molybdenum-substitution on the crystal structure of the material. Partial replacement of W with 10 and 30 mol% Mo is i...
| Autores: | , |
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| Tipo de recurso: | artículo |
| Estado: | Versión aceptada para publicación |
| Fecha de publicación: | 2016 |
| País: | España |
| Institución: | Consejo Superior de Investigaciones Científicas (CSIC) |
| Repositorio: | DIGITAL.CSIC. Repositorio Institucional del CSIC |
| OAI Identifier: | oai:digital.csic.es:10261/155977 |
| Acceso en línea: | http://hdl.handle.net/10261/155977 |
| Access Level: | acceso abierto |
| Palabra clave: | Lanthanum tungstate Proton conductor Structure Electrical conductivity Mo-substitution |
| Sumario: | We report on the comparison of the local and average structure reported recently for proton conducting lanthanum tungstate, of general formula La28−xW4+xO54+δv2−δ, and the impact of molybdenum-substitution on the crystal structure of the material. Partial replacement of W with 10 and 30 mol% Mo is investigated here, i.e. La27(W1−xMox)5O55.5 for x = 0.1 and 0.3. This study addresses the interpretation and the description of a disordered cation and anion sublattice in this material, which enables the understanding of the fundamental properties related to hydration, transport properties and degradation in lanthanum tungstate. The report shows that Mo-substituted lanthanum tungstate is a promising material as a dense oxide membrane for hydrogen separation at intermediate temperatures. |
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