Abstract
A-site substituted cerium metavanadates, Ce1-xSrxVO3, were synthesised by solid-state reactions from single-phase powders of the corresponding orthovanadates. All samples were found to exhibit an orthorhombic perovskite structure of space group Pnma (62) with a = 5.5181 (3), b = 7.7853 (2) and c = 5.5155 (4) angstrom for Ce0.85Sr0.15VO3. Conductivity measurements were performed in air and in dry 5% H-2-Ar with conductivity values at 700 degrees C ranging from 0.1 to 2.5 S cm(-1) with peaking at 6 S cm(-1) in reduced atmosphere. X-Ray diffraction patterns and thermal analyses have shown that the reduction of Sr-doped CeVO3 from the equivalent orthovanadate is redox phase reversible without formation of parasitic phases while the undoped CeVO4 is not.
Original language | English |
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Pages (from-to) | 525-531 |
Number of pages | 7 |
Journal | Journal of Materials Chemistry |
Volume | 21 |
Issue number | 2 |
Early online date | 27 Oct 2010 |
DOIs | |
Publication status | Published - 2011 |
Keywords
- fuel cell anodes
- magnetic properties
- perovskites
- CEVO4
- CA
- transport
- vanadate
- crystal
- PR
- ND