First Stage of Thermal Aging under Oxidizing Conditions of a Ce 0.62 Zr 0.38 O 2 Mixed Oxide with an Ordered Cationic Sublattice: A Chemical, Nanostructural, and Nanoanalytical Study

First Stage of Thermal Aging under Oxidizing Conditions of a Ce 0.62 Zr 0.38 O 2 Mixed Oxide with an Ordered Cationic Sublattice: A Chemical, Nanostructural, and Nanoanalytical Study. Yeste, M. P., Hernández, J. C., Trasobares, S., Bernal, S., Blanco, G., Calvino, J. J., Pérez-Omil, J. A., & Pintado, J. M. Chemistry of Materials, 20(15):5107–5113, aug, 2008.

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After being heated in a flow of 5% O2/He, at 1073 or 1123 K for 30 min, a Ce0.62Zr0.38O2 sample showing an ordered cationic sublattice had very subtle surface nanostructural changes induced on it. In parallel with them, a significant loss of low-temperature (77 \textless 773 K) oxygen storage capacity (OSC), with no modification of its high-temperature (T \textgreater 973 K) redox response, was observed. These nanostructural and chemical features characterize the very first stage of the process leading to the destruction of the ordered Ce-Zr sublattice, a structural phenomenon playing a key role in the control of redox behavior of ceria-zirconia mixed oxides. The reported results, including OSC, hydrogen chemisorption, and nanostructural and nanoanalytical data, lend further support to a model providing a comprehensive interpretation of the complex relationship linking thermal aging conditions, nanostructural properties, surface chemistry, and redox behavior in these materials. \textcopyright 2008 American Chemical Society.

@article{Yeste2008,
abstract = {After being heated in a flow of 5{\%} O2/He, at 1073 or 1123 K for 30 min, a Ce0.62Zr0.38O2 sample showing an ordered cationic sublattice had very subtle surface nanostructural changes induced on it. In parallel with them, a significant loss of low-temperature (77 {\textless} 773 K) oxygen storage capacity (OSC), with no modification of its high-temperature (T {\textgreater} 973 K) redox response, was observed. These nanostructural and chemical features characterize the very first stage of the process leading to the destruction of the ordered Ce-Zr sublattice, a structural phenomenon playing a key role in the control of redox behavior of ceria-zirconia mixed oxides. The reported results, including OSC, hydrogen chemisorption, and nanostructural and nanoanalytical data, lend further support to a model providing a comprehensive interpretation of the complex relationship linking thermal aging conditions, nanostructural properties, surface chemistry, and redox behavior in these materials. {\textcopyright} 2008 American Chemical Society.},
author = {Yeste, María P. and Hernández, Juan C. and Trasobares, Susana and Bernal, Seraf{\'{i}}n and Blanco, Ginesa and Calvino, José J. and Pérez-Omil, José A. and Pintado, José M.},
doi = {10.1021/cm800928p},
issn = {0897-4756},
journal = {Chemistry of Materials},
month = {aug},
number = {15},
pages = {5107--5113},
title = {{First Stage of Thermal Aging under Oxidizing Conditions of a Ce 0.62 Zr 0.38 O 2 Mixed Oxide with an Ordered Cationic Sublattice: A Chemical, Nanostructural, and Nanoanalytical Study}},
url = {http://www.scopus.com/inward/record.url?eid=2-s2.0-50249129711{\&}partnerID=tZOtx3y1},
volume = {20},
year = {2008}
}

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