| Autor: |
Kepeng Song, Herbert Schmid, Vesna Srot, Elisa Gilardi, Giuliano Gregori, Kui Du, Joachim Maier, Peter A. van Aken |
| Jazyk: |
angličtina |
| Rok vydání: |
2014 |
| Předmět: |
|
| Zdroj: |
APL Materials, Vol 2, Iss 3, Pp 032104-032104-8 (2014) |
| Druh dokumentu: |
article |
| ISSN: |
2166-532X |
| DOI: |
10.1063/1.4867556 |
| Popis: |
Epitaxial CeO2 films with different thickness were grown on Y2O3 stabilised Zirconia substrates. Reduction of cerium ions at the interface between CeO2 films and yttria stabilised zirconia substrates is demonstrated using aberration-corrected scanning transmission electron microscopy combined with electron energy-loss spectroscopy. It is revealed that most of the Ce ions were reduced from Ce4+ to Ce3+ at the interface region with a decay of several nanometers. Several possibilities of charge compensations are discussed. Irrespective of the details, such local non-stoichiometries are crucial not only for understanding charge transport in such hetero-structures but also for understanding ceria catalytic properties. |
| Databáze: |
Directory of Open Access Journals |
| Externí odkaz: |
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