Dopants and defects: local structure and dynamics in barium cerates and zirconates

Francesco Giannici, Antonino Martorana, Antonella Balerna, Klaus-Dieter Kreuer, Antonino Martorana, Alessandro Longo

Risultato della ricerca: Articlepeer review

31 Citazioni (Scopus)


In this paper we present an overview of state-of-the-art EXAFS measurements and data analysis on Ba, Ce, Zr, Y, In and Gd local environments in Y:BaCeO3, In:BaCeO3, Gd:BaCeO3, Y:BaZrO3, and In:BaZrO3, at different temperatures, hydration degrees and doping levels. This approach allows to reach unprecedented insights on the peculiar role of the dopant, and its interactions with the other lattice defects. In particular, we evidence that each different dopant shows unique behavior, depending mainly on its electronic structure, and that the usual criterion of ionic radius matching is not useful to outline an effective doping strategy of proton-conducting perovskites. As what concerns the structure-property relationships, we evidence that the high dopant solubility, the high symmetry around the doped site, and the low local disorder, are detrimental for proton conductivity.
Lingua originaleEnglish
pagine (da-a)122-125
Numero di pagine4
RivistaSolid State Ionics
Stato di pubblicazionePublished - 2010

All Science Journal Classification (ASJC) codes

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  • ???subjectarea.asjc.2500.2500???
  • ???subjectarea.asjc.3100.3104???


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