Synergic Effect of Metal and Fluorine Doping on the Structural and Electrical Properties of LaMoO-Based Materials.

Cationic and anionic frameworks of LaMoO proton conductors have been modified by means of metal (Ti, Zr, and Nb) and fluorine (F) doping. This synergic effect leads to the stabilization of high-symmetry and single-phase polymorphs. The materials have been fully characterized by structural techniques, such as X-ray and neutron powder diffraction and transmission electron microscopy.

Metal-Doping of LaMoO Proton Conductors: Impact on the Structure and Electrical Properties.

LaMoO proton conductors with different metal doping (Ca, Sr, Ba, Ti, Zr, and Nb) have been prepared and structurally and electrically characterized. Different polymorphs are stabilized depending on the doping and cooling rate used during the synthesis process. The most interesting results are obtained for Nb-doping, LaMoNb O, where single compounds are obtained in the compositional range 0 ≤ x ≤ 0.