کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
7726011 | 1497854 | 2018 | 9 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Effects of propylene, methyl methacrylate and isopropanol poisoning on spatial performance of a proton exchange membrane fuel cell
ترجمه فارسی عنوان
اثرات مسمومیت پروپیلن، متیل متاکریلات و ایزوپروپانول بر عملکرد فضایی سلول سوختی غشایی تبادل پروتون
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کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
شیمی
الکتروشیمی
چکیده انگلیسی
This paper studies the effects of propylene, methyl methacrylate (MMA) and isopropanol (IPA) in air on the spatial performance of proton exchange membrane fuel cells (PEMFCs). The introduction of 100â¯ppm C3H6 into the oxidant stream resulted in a performance decrease of 130â¯mVâ¯at 1.0â¯Aâ¯cmâ2, whereas 20â¯ppm MMA caused a voltage loss of 80â¯mV. A moderate performance decline of 60â¯mV was detected in the presence of 5.3â
103â¯ppm IPA in air. Spatial electrochemical impedance spectroscopy (EIS) data showed an increase in charge and mass transfer resistances under exposure to C3H6 and MMA, although IPA did not affect the impedance. The observed PEMFC performances, local current redistributions and EIS data can be explained by the adsorption of contaminants on the Pt surface, their subsequent transformations, and their impacts on the electrochemical surface area and oxygen reduction mechanism. It was assumed that the studied contaminants were oxidized mainly to CO2 via electrochemical and chemical pathways under the operating conditions and at the cathode potential. Self-recovery of PEMFC performance was observed for each contaminant after halting its introduction into the air. Possible contaminant oxidation/reduction mechanisms and their correlations with spatial performance and EIS are presented and discussed.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Power Sources - Volume 378, 28 February 2018, Pages 216-224
Journal: Journal of Power Sources - Volume 378, 28 February 2018, Pages 216-224
نویسندگان
Tatyana V. Reshetenko, Jean St-Pierre,