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 |
|---|---|
| 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 |
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Keywords
- fuel cell anodes
- magnetic properties
- perovskites
- CEVO4
- CA
- transport
- vanadate
- crystal
- PR
- ND
Cite this
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Novel redox reversible oxide, Sr-doped cerium orthovanadate to metavanadate. / Petit, Christophe T. G.; Lan, Rong; Cowin, Peter I.; Irvine, John T. S.; Tao, Shanwen.
In: Journal of Materials Chemistry, Vol. 21, No. 2, 2011, p. 525-531.Research output: Contribution to journal › Article
TY - JOUR
T1 - Novel redox reversible oxide, Sr-doped cerium orthovanadate to metavanadate
AU - Petit, Christophe T. G.
AU - Lan, Rong
AU - Cowin, Peter I.
AU - Irvine, John T. S.
AU - Tao, Shanwen
PY - 2011
Y1 - 2011
N2 - 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.
AB - 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.
KW - fuel cell anodes
KW - magnetic properties
KW - perovskites
KW - CEVO4
KW - CA
KW - transport
KW - vanadate
KW - crystal
KW - PR
KW - ND
UR - http://www.scopus.com/inward/record.url?scp=78650402504&partnerID=8YFLogxK
U2 - 10.1039/c0jm02669g
DO - 10.1039/c0jm02669g
M3 - Article
VL - 21
SP - 525
EP - 531
JO - Journal of Materials Chemistry
JF - Journal of Materials Chemistry
SN - 0959-9428
IS - 2
ER -