Ceria-based electrolytes prepared by solution combustion synthesis: The role of fuel on the materials properties

Antonino Martorana, Chiara Aliotta, Deganello, Muccillo, Valeria La Parola, Muccillo, Leonarda F. Liotta, Francesca Deganello, Leonarda Francesca Liotta, Valeria La Parola

Research output: Contribution to journalArticlepeer-review

28 Citations (Scopus)

Abstract

Ce0.8Sm0.2O2 â xpowders were synthesized by solution combustion synthesis using citric acid, cellulose and sucrose as single, or intimately mixed, fuels. The powders were characterized by X-ray diffraction, transmission electron microscopy, X-ray photoelectron spectroscopy, N2sorption at â196 °C, H2-temperature programmed reduction and thermogravimetric analyses. Textural properties of the powders were shaped by the peculiar employed fuel. The study of reducibility revealed that oxygen vacancies formation is mainly influenced by both parameters, specific surface area and total pore volume. The different tendency toward reduction played a key role in sintering under reducing atmosphere (4% H2/Ar), and Ce0.8Sm0.2O2 â xprepared with sucrose showed, at scanning electron microscopy images, the highest average grain size. Impedance spectroscopy experiments in air disclosed different grain boundary resistances on the basis of synthesis fuel employed and, in particular, Ce0.8Sm0.2O2 â xprepared with sucrose exhibited the best electrical performance. Solution combustion synthesis thereby was able to tailor the morphological and reduction properties of Ce0.8Sm0.2O2 â xpowders affecting even the microstructure of sintered pellet.
Original languageEnglish
Pages (from-to)14-22
Number of pages9
JournalAPPLIED CATALYSIS. B, ENVIRONMENTAL
Volume197
Publication statusPublished - 2016

All Science Journal Classification (ASJC) codes

  • Catalysis
  • Environmental Science(all)
  • Process Chemistry and Technology

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