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Ragnhild Hancke

University of Oslo

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Journal of Materials Chemistry | 2012

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

This is the first paper reporting that lanthanum tungstate, earlier believed to be La6WO12, is in fact La28−xW4+xO54+δ , where tungsten dissolves in lanthanum sites to form a stable solid-state electrolyte, exhibiting proton conduction by hydration at intermediate temperatures.

International Journal of Hydrogen Energy | 2012

Defect structure and its nomenclature for mixed conducting lanthanum tungstates La28―xW4+xO54+3x/2

Skjalg Erdal; Liv-Elisif Kalland; Ragnhild Hancke; Jonathan M. Polfus; Reidar Haugsrud; Truls Norby; Anna Magrasó

Solid State Ionics | 2013

Hydration of lanthanum tungstate (La/W = 5.6 and 5.3) studied by TG and simultaneous TG–DSC

Ragnhild Hancke; Anna Magrasó; Truls Norby; Reidar Haugsrud

Physical Chemistry Chemical Physics | 2012

Determination of proton- and oxide ion tracer diffusion in lanthanum tungstate (La/W = 5.6) by means of ToF-SIMS

Ragnhild Hancke; Sarah Fearn; John A. Kilner; Reidar Haugsrud

International Journal of Hydrogen Energy | 2012

Thermogravimetric relaxation study of the proton conductor lanthanum tungstate, La28−xW4+xO54+δv2−δ, x = 0.85

Ragnhild Hancke; Zuoan Li; Reidar Haugsrud

International Journal of Hydrogen Energy | 2012

Atomistic study of LaNbO4; surface properties and hydrogen adsorption

K. Hadidi; Ragnhild Hancke; Truls Norby; O.M. Løvvik

Journal of Membrane Science | 2013

Hydrogen surface exchange on proton conducting oxides studied by gas phase analysis with mass spectrometry

Ragnhild Hancke; Zuoan Li; Reidar Haugsrud

Journal of The Electrochemical Society | 2013

The Kinetics of Hydration and H/D Isotope Exchange of Y-Doped Barium Cerate and Lanthanum Tungstate Studied by Transient Thermogravimetry

Ragnhild Hancke; Zuoan Li; Reidar Haugsrud

Journal of Membrane Science | 2018

Ohmically heated ceramic asymmetric tubular membranes for gas separation

Ragnhild Hancke; Thorbjørn V. Larsen; Wen Xing; Zuoan Li; Marie-Laure Fontaine; Truls Norby

Solid State Ionics | 2017

The correlation between surface kinetic and bulk diffusion properties of proton conducting oxides

Ragnhild Hancke; Reidar Haugsrud

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