Structural characterization of Tb- and Pr-doped ceria
作者： Mauro Coduri , Marco Scavini , Michela Brunelli , Erika Pedrazzin , Paolo Masala
DOI: 10.1016/J.SSI.2014.10.020
关键词:
摘要: Abstract The crystallographic structure of Tb- and Pr-doped ceria is investigated through X-ray neutron powder diffraction, combining pair distribution function UV–vis spectroscopy. Compared to trivalent dopants, Tb Pr show peculiar optical properties: whilst have a mixed +3/+4 valence state, stable mostly in the +4 state up ~50% dopant concentration. For larger amounts, doping promotes fluorite monoclinic phase transformation. A straightforward method for extracting oxidation by cell parameter dependence on ionic radius also proposed.
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