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

resumo

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.

palavras-chave

FUEL-CELLS; ANODES

categoria

Energy & Fuels; Materials Science

autores

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

Grupos

Partilhe este projeto

Publicações similares

Usamos cookies para atividades de marketing e para lhe oferecer uma melhor experiência de navegação. Ao clicar em “Aceitar Cookies” você concorda com nossa política de cookies. Leia sobre como usamos cookies clicando em "Política de Privacidade e Cookies".