TY  - JOUR
U1  - Wissenschaftlicher Artikel
A1  - Song, Kepeng
A1  - Schmid, Herbert K.
A1  - Srot, Vesna
A1  - Gilardi, Elisa
A1  - Gregori, Giuliano
A1  - Du, Kui
A1  - Maier, Joachim
A1  - van Aken, Peter A.
T1  - Cerium reduction at the interface between ceria and yttria-stabilised zirconia and implications for interfacial oxygen non-stoichiometry
JF  - APL Materials
N2  - Epitaxial CeO 2 films with different thickness were grown on Y 2 O 3 stabilised Zirconia substrates. Reduction of cerium ions at the interface between CeO 2 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 Ce 4+ to Ce 3+ 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.
KW  - cerium compounds
KW  - charge compensation
KW  - electron energy loss spectra
KW  - scanning-transmission electron microscopy
KW  - epitaxial layers
KW  - catalysis
KW  - stoichiometry
KW  - epitaxial growth
Y1  - 2014
UN  - https://nbn-resolving.org/urn:nbn:de:bsz:291:415-4589
SN  - 2166-532X
SS  - 2166-532X
U6  - https://doi.org/10.1063/1.4867556
DO  - https://doi.org/10.1063/1.4867556
VL  - 2
IS  - 3
SP  - 32104
S1  - 32104
ER  -