TY  - JOUR
AU  - Neuhaus, Kerstin
AU  - Eickholt, Sebastian
AU  - Maheshwari, Aditya
AU  - Schulze-Küppers, Falk
AU  - Baumann, Stefan
AU  - Wiemhöfer, Hans-Dieter
TI  - Analysis of Charge Transport in Ce 0.8 Gd 0.2-x Pr x O 2-δ at T ≤ 600°C
JO  - Journal of the Electrochemical Society
VL  - 164
IS  - 7
SN  - 1945-7111
CY  - Pennington, NJ
PB  - Electrochemical Soc.
M1  - FZJ-2017-06976
SP  - H491 - H496
PY  - 2017
AB  - 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. 
LB  - PUB:(DE-HGF)16
UR  - <Go to ISI:>//WOS:000404397300150
DO  - DOI:10.1149/2.0931707jes
UR  - https://juser.fz-juelich.de/record/838360
ER  -