کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
7744772 | 1498229 | 2018 | 8 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Impact of defect chemistry on cathode performance: A case study of Pr-doped ceria
دانلود مقاله + سفارش ترجمه
دانلود مقاله ISI انگلیسی
رایگان برای ایرانیان
موضوعات مرتبط
مهندسی و علوم پایه
شیمی
الکتروشیمی
پیش نمایش صفحه اول مقاله
چکیده انگلیسی
Pr-doped ceria (PCO) is a mixed ionic-electronic conductor (MIEC) under oxidizing conditions, with excellent ionic and relatively low electronic conductivity. Motivated by investigations of model systems, PCO is examined with regards to the performance as an SOFC air electrode. The conductivity of Pr0.2Ce0.8O2âδ (20PCO) in air is examined in detail, and a novel technique based on high-temperature X-ray diffraction (HT-XRD) to identify the exact temperature at which half of all Pr-dopants are ionized is presented. The redox-state of the Pr dopants strongly influences the polaron mobility, which can be linked to an increase of the polarization resistance of symmetric cells with 20PCO electrodes, indicating a change of the rate-limiting step for the oxygen reduction reaction (ORR).
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Solid State Ionics - Volume 314, January 2018, Pages 204-211
Journal: Solid State Ionics - Volume 314, January 2018, Pages 204-211
نویسندگان
Christian Lenser, Felix Gunkel, Yoo Jung Sohn, Norbert H. Menzler,