Studies on the perovskite-based La4Srn-4TinO3n+2.

J Canales-Vazquez*, S Tao, M Patrakeev, JTS Irvine, WB Zhou, J Frade

*Corresponding author for this work

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

Perovskite titanates with nominal stoichiometry ABO(3+delta) are frequently reported in SOFC literature as having O-3 stoichiometry. Such phases often exhibit quite interesting properties, but are not stoichiometric and the structural characterisation is usually not rigorous. Here we demonstrate how oxygen excess can be incorporated in a titanate perovskite-based lattice as crystallographic oxygen shears giving rise to the homologous series La4Srn-4TinO3n+2. The layered structure is lost for the n=12 member (La4Sr8Ti12O38-delta), although the oxygen excess is accommodated within the perovskite framework in randomly distributed short-range linear defects. Ibis compound was studied as potential fuel electrode due to its high total conductivity and stability in the most reducing conditions.

Original languageEnglish
Title of host publicationMATERIALS AND TECHNOLOGY FOR HYDROGEN ECONOMY
EditorsGA Nazri, M Nazri, R Young, P Chen
Place of PublicationWARRENDALE
PublisherMATERIALS RESEARCH SOCIETY
Pages211-216
Number of pages6
ISBN (Print)1-55899-739-3
Publication statusPublished - 2004
EventSymposium on Materials and Technology for Hydrogen Economy held at the 2003 MRS Fall Meeting - Boston, Morocco
Duration: 1 Dec 20033 Dec 2003

Publication series

NameMATERIALS RESEARCH SOCIETY SYMPOSIUM PROCEEDINGS
PublisherMATERIALS RESEARCH SOCIETY
Volume801
ISSN (Print)0272-9172

Conference

ConferenceSymposium on Materials and Technology for Hydrogen Economy held at the 2003 MRS Fall Meeting
Country/TerritoryMorocco
CityBoston
Period1/12/033/12/03

Keywords

  • ANODES
  • FUEL-CELLS

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