Synthesis, structure and protonic conduction of BaSn0.875M0.125O3-d (M [ Sc, Y, In and Gd)

Yanzhong Wang (1, 2) , Anthony Chesnaud (3) , Emile Bévillon (2) , Jinlong Yang (1) , Guilhem Dezanneau (2)

1 School of Materials science and engineering
2 SPMS - Laboratoire Structures, Propriétés et Modélisation des solides
3 CDM - Centre des Matériaux

The acceptor-substituted BaSn0.875M0.125O3-d (M ¼ Sc, In, Y, and Gd) proton conductors were prepared by a wet chemical method. The effects of dopant nature on the structure, hydration energy and proton conduction have been investigated. Analysis of XRD data showed that all compounds present a cubic perovskite structure (space group: Pm3 m). Thermogravimetry analysis showed that the significant mass of water was gained in wet Ar during measurements, and the most negative hydration energy is observed for Sc-substituted BaSnO3 ( 86 kJ/mol). However, Y-substituted BaSnO3 exhibits the highest proton conductivity at low temperature under wet Ar, such as the total conductivity is 4.8 10 4 S/cm at 600 C.

Mots clés: BaSnO3; Perovskite structure; Lattice parameters; Hydration energy; Proton conductor

Domaines: Science des matériaux [cond-mat.mtrl-sci]

Yanzhong Wang, Anthony Chesnaud, Emile Bévillon, Jinlong Yang, Guilhem Dezanneau. Synthesis, structure and protonic conduction of BaSn0.875M0.125O3-d (M [ Sc, Y, In and Gd). International Journal of Hydrogen Energy, 2011, 36, pp.7688-7695. ⟨10.1016/j.ijhydene.2011.03.105⟩. ⟨hal-00594186⟩