کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
7719427 | 1497494 | 2014 | 8 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
AC impedance spectroscopy investigation of carbon supported Pt3Co and Pt cathode catalysts in direct methanol fuel cell
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کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
شیمی
الکتروشیمی
پیش نمایش صفحه اول مقاله
چکیده انگلیسی
The performance of direct methanol fuel cells containing carbon supported Pt3Co and Pt cathode catalysts with 3 nm crystallite size was investigated by AC electrochemical impedance spectroscopy under load. The electrochemical investigations were carried out at 40 °C and as a function of the cell voltage, oxygen vs. air feed, gas flow rate and methanol concentration. From the response of the total impedance spectra to the tested parameters, simple equivalent circuits were built and used to fit the complete DMFC impedance spectra. The electrochemical parameters (charge transfer resistance, double layer capacitance, relaxation resistance and relaxation inductance for the adsorbed species) associated with the oxygen reduction and methanol poisoning effects were determined. The AC impedance study confirmed the lower methanol tolerance of Pt3Co catalyst compared to the Pt catalyst.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: International Journal of Hydrogen Energy - Volume 39, Issue 15, 15 May 2014, Pages 8026-8033
Journal: International Journal of Hydrogen Energy - Volume 39, Issue 15, 15 May 2014, Pages 8026-8033
نویسندگان
F. Capitanio, S. Siracusano, A. Stassi, V. Baglio, A.S. Aricò, A.C. Tavares,