Optically derived energy band gap states of Pr in ceria
Praseodymium doped cerium oxide (PrxCe1− xO2− δ; PCO) exhibits mixed ionic and
electronic conductivity at relatively high oxygen partial pressures (eg air) and enhanced
oxygen storage capacity resulting from the ready reduction/oxidation of tri-and tetra-valent
Pr. A change in the redox state of Pr results in a color change of PCO, and so serves as a
means of investigating the Pr oxidation state, oxygen non-stoichiometry, and position of the
Pr energy level within the ceria band gap. The wavelength dependent optical absorptivity …
electronic conductivity at relatively high oxygen partial pressures (eg air) and enhanced
oxygen storage capacity resulting from the ready reduction/oxidation of tri-and tetra-valent
Pr. A change in the redox state of Pr results in a color change of PCO, and so serves as a
means of investigating the Pr oxidation state, oxygen non-stoichiometry, and position of the
Pr energy level within the ceria band gap. The wavelength dependent optical absorptivity …
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