Oxyanions in perovskites : from superconductors to solid oxide fuel cells

Cathryn Hancock, J.m. Porras-vázquez, Philip Keenan, Peter Slater

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31 Citations (Scopus)
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Abstract

In this article we review work on oxyanion (carbonate, borate, nitrate, phosphate, sulphate, silicate) doping in perovskite materials beginning with early work on doping studies in superconducting cuprates, and extending to more recent work on doping into perovskite-type solid oxide fuel cell materials. In this doping strategy, the central atom of the oxyanion group occupies the perovskite B cation site, with the associated oxide ions filling 3 (carbonate, nitrate, borate) or 4 (phosphate, sulphate, silicate) of the available 6 anion sites around this site, albeit displaced so as to achieve the required geometry for the oxyanion. We highlight the potential of this doping strategy to prepare new systems, stabilize phases that cannot be prepared under ambient pressure conditions, and lead to modifications to the electronic and ionic conductivity. We also highlight the need for further work in this area, in particular to evaluate the carbonate content of perovskite phases in general.
Original languageEnglish
Pages (from-to)10559-10569
Number of pages11
JournalDalton Transactions
Volume44
Issue number23
Early online date7 Nov 2014
DOIs
Publication statusPublished - 7 Aug 2015

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