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dc.contributor.authorFop, Sacha
dc.contributor.authorSkakle, Janet M. S.
dc.contributor.authorMcLaughlin, Abbie C.
dc.contributor.authorConnor, Paul A.
dc.contributor.authorIrvine, John T. S.
dc.contributor.authorSmith, Ronald I.
dc.contributor.authorWildman, Eve J.
dc.identifier.citationFop , S , Skakle , J M S , McLaughlin , A C , Connor , P A , Irvine , J T S , Smith , R I & Wildman , E J 2016 , ' Oxide ion conductivity in the hexagonal perovskite derivative Ba 3 MoNbO 8.5 ' , Journal of the American Chemical Society , vol. 138 , no. 51 , pp. 16764-16769 .
dc.identifier.otherPURE: 248917303
dc.identifier.otherPURE UUID: a0feacd2-89d1-48a8-99fb-e1c1af8817b8
dc.identifier.otherScopus: 85008329622
dc.identifier.otherORCID: /0000-0002-1492-7590/work/60427182
dc.identifier.otherWOS: 000391081800030
dc.identifier.otherORCID: /0000-0002-8394-3359/work/68280541
dc.descriptionThis research was supported by the Northern Research Partnership and the University of Aberdeen.en
dc.description.abstractOxide ion conductors are important materials with a range of technological applications and are currently used as electrolytes for solid oxide fuel cells and solid oxide electrolyzer cells. Here we report the crystal structure and electrical properties of the hexagonal perovskite derivative Ba3MoNbO8.5. Ba3MoNbO8.5 crystallizes in a hybrid of the 9R hexagonal perovskite and palmierite structures. This is a new and so far unique crystal structure that contains a disordered distribution of (Mo/Nb)O6 octahedra and (Mo/Nb)O4 tetrahedra. Ba3MoNbO8.5 shows a wide stability range and exhibits predominantly oxide ion conduction over a pO2 range from 10-20 to 1 atm with a bulk conductivity of 2.2 × 10-3 S cm-1 at 600 °C. The high level of conductivity in a new structure family suggests that further study of hexagonal perovskite derivatives containing mixed tetrahedral and octahedral geometry could open up new horizons in the design of oxygen conducting electrolytes.
dc.relation.ispartofJournal of the American Chemical Societyen
dc.rightsCopyright © 2016 American Chemical Society. This work is made available online in accordance with the publisher’s policies. This is the author created, accepted version manuscript following peer review and may differ slightly from the final published version. The final published version of this work is available at
dc.subjectQD Chemistryen
dc.subjectColloid and Surface Chemistryen
dc.titleOxide ion conductivity in the hexagonal perovskite derivative Ba3MoNbO8.5en
dc.typeJournal articleen
dc.contributor.institutionUniversity of St Andrews.School of Chemistryen
dc.contributor.institutionUniversity of St Andrews.St Andrews Sustainability Instituteen
dc.contributor.institutionUniversity of St Andrews.EaSTCHEMen
dc.description.statusPeer revieweden

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