%0 Journal Article
%A Neuhaus, Kerstin
%A Eickholt, Sebastian
%A Maheshwari, Aditya
%A Schulze-Küppers, Falk
%A Baumann, Stefan
%A Wiemhöfer, Hans-Dieter
%T Analysis of Charge Transport in Ce 0.8 Gd 0.2-x Pr x O 2-δ at T ≤ 600°C
%J Journal of the Electrochemical Society
%V 164
%N 7
%@ 1945-7111
%C Pennington, NJ
%I Electrochemical Soc.
%M FZJ-2017-06976
%P H491 - H496
%D 2017
%X Doped ceria pellets with the composition Ce0.8Gd0.2-xPrxO2-δ with x = 0.15, 0.1, 0.05, and 0.03 were investigated with a special focus on the partial conductivities in the temperature range of 200–600°C. Temperature dependent conductivity provided by impedance spectroscopy in air was compared to measurements of the oxygen partial pressure dependent electronic conductivity. The electronic conductivity was analyzed down to 200°C by using a modified Hebb-Wagner setup with encapsulated Pt microcontacts. A small polaron hopping process introduced by reduction of praseodymium was found to have a pronounced influence on the electronic conductivity at low temperatures. A splitting of the maximum introduced by praseodymium small polaron hopping was observed. Especially for the compositions x ≤ 0.1, a strong deviation of the electronic conductivity curves from the standard acceptor doping case was measured due to superimposed electronic conductivity from the Pr3+/4+ redox reaction. 
%F PUB:(DE-HGF)16
%9 Journal Article
%U <Go to ISI:>//WOS:000404397300150
%R 10.1149/2.0931707jes
%U https://juser.fz-juelich.de/record/838360