Oxygen-vacancy concentration in A2MgMoO 6-δ double-perovskite oxides
Abstract
Accurate oxygen-content analysis by means of a coulometric redox titration method specially devised for the purpose shows that as-synthesized (in 5% H 2/Ar) samples of the recently reported novel solid oxide fuel cells anode material Sr 2MgMoO 6-δ contain oxygen vacancies with a concentration of δ≈0.05. Oxygen contents and the resultant Mo-valence values are also analyzed for various A2MgMoO 6-δ samples in order to reveal both the isovalent and aliovalent A-site cation substitution effects.
- Publication:
-
Journal of Solid State Chemistry France
- Pub Date:
- July 2009
- DOI:
- 10.1016/j.jssc.2009.04.016
- Bibcode:
- 2009JSSCh.182.1713M