Ordered mesoporous metal oxides for solid oxide fuel cells and gas sensors

• Autores: Laura Almar Liante
• Directores de la Tesis: Alberto Tarancón Rubio (dir. tes.), Joan Ramon Morante i Lleonart (dir. tes.), Teresa Andreu Arbella (dir. tes.)
• Lectura: En la Universitat de Barcelona ( España ) en 2014
• Idioma: inglés
• Tribunal Calificador de la Tesis: Francisca Peiró Martínez (presid.), Eva M. Pellicer Vilà (secret.)
• Materias:
  • Física
    • Física del estado sólido
  • Ciencias tecnológicas
    • Tecnología de materiales
      • Materiales cerámicos
      • Materiales metalocerámicos (cermets)
    • Tecnología energética
      • Generadores de energía
• Enlaces
  • Tesis en acceso abierto en:  TDX  Dipòsit Digital de la UB  TESEO 
• Resumen

  • Nanomaterials have received increasing attention during the last decades in the solid state field since they play a major role as catalyst and catalyst supports for many applications including fuel cells or gas sensors. The interest is mainly due to their high specific surface area, which leads to an increase of performance and a cost-effective solution for expensive or rare materials. However, many studies have reported the collapse of nanostructures at high temperature as one of the main drawbacks for their implementation in real devices and therefore, routes to thermally stabilize these materials must be explored. In this thesis, the unique features of ordered mesoporous materials fabricated by nanocasting are exploited to create quasi-universal thermal stabilization methodologies, allowing implementing and evaluating them in high temperature energy applications e.g. solid oxide fuel cells. The work developed is divided into seven parts. The first chapter introduces the basics of mesoporous materials, solid oxide fuel cells, catalysis and gas sensors. The second chapter focuses on the experimental procedures and the characterization tools employed. In the third chapter, a novel route to thermally stabilize 3-D open mesoporous structures is presented. The next three chapters, show the fabrication and evaluation of thermal stable mesoporous materials as electrodes for solid oxide fuel cells. Finally, chapter seven presents the suitability of mesoporous ceramic oxides as functional materials in humidity sensors.