We found a match
Your institution may have access to this item. Find your institution then sign in to continue.
- Title
Structural investigation of Ce<sub>2</sub>Zr<sub>2</sub>O<sub>8</sub> after redox treatments which lead to low temperature reduction.
- Authors
Alessandri, I.; Bañares, M. A.; Depero, L. E.; Ferroni, M.; Fornasiero, P.; Gennari, F. C.; Hickey, N.; Martinez-Huerta, M. V.; Montini, T.
- Abstract
Structural investigations of various aliquots of Ce2Zr2O8 were conducted after application of well-defined redox treatments. The results indicate that specific redox procedures induce modifications in the ceria–zirconia mixed oxide, which lead to notable effects on the hydrogen uptake temperature during Temperature Programmed Reduction (TPR). Pyrochlore-type cation ordering is evident for an aliquot which exhibits a single low temperature peak during TPR. However, the cation ordering is not complete in this case. Furthermore, the analysis indicates less extensive pyrochlore-type cation ordering for an aliquot which shows a TPR profile in which there are two peaks, one at high temperature and one at low temperature. Finally, an aliquot that exhibits a single high temperature TPR peak shows no evidence of cation ordering. The trend in the promotion of reduction to low temperature is associated with the extent of the pyrochlore-type cation ordering.
- Subjects
OXIDATION-reduction reaction; ALIQUOT sequences; CERIUM oxides; ZIRCONIUM oxide; MIXED oxide fuels (Nuclear engineering); CATALYSTS
- Publication
Topics in Catalysis, 2007, Vol 41, Issue 1-4, p35
- ISSN
1022-5528
- Publication type
Article
- DOI
10.1007/s11244-006-0092-8