Multivalent Pr doped ceria is a potential candidate for SOFCs due to its
mixed electronic and ionic conductivity. The valence state of Pr
significantly affects the lattice parameter of Pr doped ceria. The
lattice parameter mainly depends on the dopant concentration, sintering
and switching of valence state. The concentration oxygen vacancies are
responsible for ionic conductivity and the oxidation of Pr3+ to Pr4+ is
the origin of electronic conductivity. The electronic conductivity
increases with the doping concentration and the oxygen partial pressure.
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