Reducibilidad y comportamiento catalítico de la fase Ruddlesden-Popper La0,25Sr1,75MnO4 preparada por el método de Pechini modificado

  • Reinaldo Calderón Supelano Centro de Investigaciones en Sólidos (UNIDEF-MINIDEF-CONICET),
  • Susana Adelina Larrondo Instituto de Investigación e Ingeniería Ambiental, Universidad de San Martín
  • Gilles Henri Gauthier Universidad Industrial de Santander
Palabras clave: SOFC, ánodo, manganita, XRD, TPR, oxidación catálica

Resumen

Se han reportado pocos estudios sobre el uso de compuestos de manganeso (La,Sr)2MnO4 de estructura tipo Ruddlesden-Popper, como electrolitos de Celdas de Combustible de Óxido Sólido (SOFC), en particular como ánodos. En este trabajo el compuesto La0,25Sr1,75MnO4 fue sintetizado por el método de Pechini modificado. Este material fue estudiado por la técnica de Difracción de Rayos X (XRD), Microscopía Electrónica de Barrido (SEM) y su estructura analizada en detalle mediante refinamiento de los patrones de difracción de rayos X. La0,25Sr1,75MnOfue sometido a un estudio de Reducción a Temperatura Programada (TPR) y se evaluaron sus propiedades catalíticas para la oxidación total y/o parcial de metano. Los parámetros de celda estimados en el refinamiento son bastante próximos con los reportados en la literatura para series con composiciones cercanas. La reducción del material en H2  diluido ocurre en múltiples etapas y la descomposición comienza por encima de 800°C. En los estudios catalíticos el material actúa como catalizador para la oxidación total de metano incluso en atmósferas deficientes de oxígeno.

 

Palabras clave: SOFC, ánodo, manganita, XRD, TPR, oxidación Catalítica.

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Publicado
2017-06-30
Cómo citar
SUPELANO, Reinaldo Calderón; LARRONDO, Susana Adelina; GAUTHIER, Gilles Henri. Reducibilidad y comportamiento catalítico de la fase Ruddlesden-Popper La0,25Sr1,75MnO4 preparada por el método de Pechini modificado. REVISTA ION, [S.l.], v. 30, n. 1, jun. 2017. ISSN 2145-8480. Disponible en: <http://revistas.uis.edu.co/index.php/revistaion/article/view/6443>. Fecha de acceso: 22 oct. 2017 doi: https://doi.org/10.18273/revion.v30n1-2017003.
Sección
Artículo de Investigación Científica y Tecnológica