کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
5150260 1497902 2016 7 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Investigation of the electrochemical reactions at a limited-contact La1−xSrxMnO3/Y-doped ZrO2 interface with a rod-type ionic-probe
موضوعات مرتبط
مهندسی و علوم پایه شیمی الکتروشیمی
پیش نمایش صفحه اول مقاله
Investigation of the electrochemical reactions at a limited-contact La1−xSrxMnO3/Y-doped ZrO2 interface with a rod-type ionic-probe
چکیده انگلیسی
A more quantitatively controllable triple phase boundary (TPB) of a lanthanum strontium manganite/yttria-stabilized zirconia (LSM/YSZ) interface was constructed by using an YSZ ionic probe with well-defined dimensions. A bar-shaped, dense YSZ sintered body was employed as an ionic probe and embedded in the pellet-shaped, dense LSM bulk. The TPB length of the LSM/YSZ interface can be simply determined from the circumference of the YSZ bars. To identify the reaction mechanism of the oxygen reduction reaction (ORR) at the TPB of the LSM/YSZ interface, limited-contact AC impedance spectroscopy was used; this distinguished the LSM/YSZ interface related polarization from other polarizations present in the Pt/LSM/YSZ/Pt electrochemical cell. By analyzing the electrode-related polarizations in the electrochemical cell with the geometrically quantified YSZ ionic probe, the rate determining step of the ORR was the diffusion of adsorbed oxygen along the LSM bulk surface. In this paper, emphasis is placed on the experimental versatility and the limitations of our designed electrochemical analysis with bar-shaped ionic probes.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Power Sources - Volume 330, 31 October 2016, Pages 285-291
نویسندگان
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