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| 001 | 834368 | ||
| 005 | 20240711085552.0 | ||
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| 037 | _ | _ | |a FZJ-2017-04341 |
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| 100 | 1 | _ | |a Lenser, Christian |0 P:(DE-Juel1)138081 |b 0 |e Corresponding author |u fzj |
| 111 | 2 | _ | |a 21st International Conference on Solid State Ionics |g SSI21 |c Padova |d 2017-06-18 - 2017-06-23 |w Italy |
| 245 | _ | _ | |a Quantifying the oxygen stoichiometry of Pr-doped ceria through X-ray diffraction |
| 260 | _ | _ | |c 2017 |
| 336 | 7 | _ | |a Conference Paper |0 33 |2 EndNote |
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| 520 | _ | _ | |a Recent studies on Pr-doped CeO$_{2}$ (PCO) model electrodes suggest that the fast oxygen surface exchange coefficient and high ionic conductivity of PCO hold the potential for a high performance air electrode material for solid oxide fuel cells (SOFCs).[1] PCO behaves as a mixed ionic-electronic conductor (MIEC) in air at elevated temperature due to the reduction of Pr$^{4+}$ to Pr$^{3+}$ and a concomitant polaronic conductivity σpol. In this study, we characterize the reduction behavior of PCO with different Pr contents in air using high temperature X-ray diffraction (HT-XRD) and compare the results to TGA measurements. Rietveld analysis of the HT-XRD data reveals a temperature-dependent micro-strain in the PCO lattice that we associate with lattice disorder due to the different ionic radii of Pr$^{4+}$ and Pr$^{3+}$. This allows us to identify the precise temperature at which the polaronic conductivity σpol is highest for a given Pr-content. We discuss the effect of the temperature dependence of σpol for air electrodes in the context of conductivity and impedance measurements.1. Chen, D., S.R. Bishop, and H.L. Tuller, Praseodymium-cerium oxide thin film cathodes: Study of oxygen reduction reaction kinetics. Journal of Electroceramics, 2012. 28(1): p. 62-69. |
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| 700 | 1 | _ | |a Gunkel, Felix |0 P:(DE-Juel1)130677 |b 1 |u fzj |
| 700 | 1 | _ | |a Sohn, Yoo Jung |0 P:(DE-Juel1)159368 |b 2 |u fzj |
| 700 | 1 | _ | |a Menzler, Norbert H. |0 P:(DE-Juel1)129636 |b 3 |u fzj |
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