کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
10267144 | 459445 | 2005 | 6 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Electrode catalysts behavior during direct ethanol fuel cell life-time test
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کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
مهندسی شیمی
مهندسی شیمی (عمومی)
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چکیده انگلیسی
In the present paper, a 60Â h life-time test of a direct ethanol fuel cell (DEFC) at a current density of 20Â mAÂ cmâ2 (the beginning 38Â h) and 40Â mAÂ cmâ2 (the last 22Â h) was carried out. After the life-time test, the MEA could not achieve the former performance. X-ray diffraction (XRD), transmission electron microscopy (TEM) and energy dispersive X-ray analysis (EDX) were employed to characterize the anode and cathode catalyst before and after the life-time test. The XRD and TEM results showed that the particle size of the anode catalyst increased from 2.3 to 3.3Â nm and the cathode from 3.0 to 4.6Â nm. The EDX results of PtSn/C anode catalysts before and after the life-time test indicated that the content of the oxygen and tin, especially the content of the platinum, decreased prominently after the life-time test. The results suggest that the agglomeration of electrocatalysts, the destruction of the anode catalyst together with the fuel/water crossover from anode to cathode concurrently contribute to the performance degradation of the DEFC.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Electrochemistry Communications - Volume 7, Issue 7, July 2005, Pages 663-668
Journal: Electrochemistry Communications - Volume 7, Issue 7, July 2005, Pages 663-668
نویسندگان
Luhua Jiang, Gongquan Sun, Suli Wang, Guoxiong Wang, Qin Xin, Zhenhua Zhou, Bing Zhou,