Complete structural model for lanthanum tungstate: a chemically stable high temperature proton conductor by means of intrinsic defects

Anna Magrasó; Jonathan M. Polfus; Carlos Frontera; Jesús Canales-Vázquez; Liv-Elisif Kalland; Charles H. Hervoches; Skjalg Erdal; Ragnhild Hancke; M. Saiful Islam; Truls Norby; Reidar Haugsrud

doi:10.1039/C2JM14981H

Complete structural model for lanthanum tungstate: a chemically stable high temperature proton conductor by means of intrinsic defects †

Anna Magrasó,*^a Jonathan M. Polfus,^a Carlos Frontera,^b Jesús Canales-Vázquez,^c Liv-Elisif Kalland,^a Charles H. Hervoches,^a Skjalg Erdal,^a Ragnhild Hancke,^a M. Saiful Islam,^d Truls Norby^a and Reidar Haugsrud^a

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^a Dept. Chemistry, University of Oslo, FERMiO/SMN, Gaustadalleen 21, Oslo, Norway
E-mail: a.m.sola@smn.uio.no
Tel: +47-2284066

^b Inst. Ciència de Materials de Barcelona, ICMAB-CSIC, Bellaterra, Spain

^c Renewable Energy Research Institute, University of Castilla-La Mancha, Paseo de la Investigación 1, Albacete, Spain

^d Dept. Chemistry, University of Bath, Bath, UK

Abstract

This is the first paper reporting that lanthanum tungstate, earlier believed to be La₆WO₁₂, is in fact La_28−xW₄₊xO_54+δ , where tungsten dissolves in lanthanum sites to form a stable solid-state electrolyte, exhibiting proton conduction by hydration at intermediate temperatures.

Journal of Materials Chemistry

Complete structural model for lanthanum tungstate: a chemically stable high temperature proton conductor by means of intrinsic defects †

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Complete structural model for lanthanum tungstate: a chemically stable high temperature proton conductor by means of intrinsic defects

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