کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
6613799 | 459615 | 2014 | 10 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Oxygen reduction at the Ag|Gd0.2Ce0.8O1.9 interface studied by electrochemical impedance spectroscopy and cyclic voltammetry at the silver point electrode
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کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
مهندسی شیمی
مهندسی شیمی (عمومی)
پیش نمایش صفحه اول مقاله
چکیده انگلیسی
Reduction of oxygen at the silver point electrode|Gd0.2Ce0.8O1.9 interface was studied by cyclic voltammetry and electrochemical impedance spectroscopy. Measurements were performed in the 500-700 °C temperature range, at the atmospheric pressure, in oxygen and in argon/oxygen atmospheres. The results of the experiments are consistent with the mechanism in which the oxygen reduction reaction proceeds through the non-electrochemical adsorption/dissociation step and a two-electron two-step electrochemical reaction with the transfer of the first electron as a rate-determining step. Slow diffusion of oxygen is confirmed by both electrochemical impedance spectroscopy and cyclic voltammetry techniques. New equivalent electrical circuit for the investigated interface is proposed.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Electrochimica Acta - Volume 120, 20 February 2014, Pages 248-257
Journal: Electrochimica Acta - Volume 120, 20 February 2014, Pages 248-257
نویسندگان
M. MosiaÅek, P. Nowak, M. Dudek, G. Mordarski,