کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
1294970 | 973647 | 2007 | 5 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
High performance membrane-electrode assembly based on a surface-modified membrane
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موضوعات مرتبط
مهندسی و علوم پایه
شیمی
الکتروشیمی
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چکیده انگلیسی
A surface-modified membrane is prepared using a sputtering technique that deposits gold directly on a Nafion® 115 membrane surface that is roughened with silicon carbide paper. The surface-modified membranes are characterized by means of a scanning electron microscope (SEM), differential scanning calorimetry (DSC), and water contact-angle analysis. A single direct methanol fuel cell (DMFC) with a surface-modified membrane exhibits enhanced performance (160 mW cmâ2), while a bare Nafion® 115 cell yields 113 mW cmâ2 at 0.4 V and an operating temperature of 70 °C. From FE-SEM images and COad stripping voltammograms, it is also found that the gold layer is composed of clusters of porous nodule-like particles, which indicates that an anode with nodule-like gold leads to the preferential oxidation of carbon monoxide. These results suggest that the topology of gold in the interfacial area and its electrocatalytic nature may be the critical factors that affect DMFC performance.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Power Sources - Volume 167, Issue 1, 1 May 2007, Pages 74-78
Journal: Journal of Power Sources - Volume 167, Issue 1, 1 May 2007, Pages 74-78
نویسندگان
Sangil Han, Jang Woo Lee, Chan Kwak, Geun Seok Chai, In Hyuk Son, Moon Yup Jang, Sung Guk An, Sung Yong Cho, Jun Young Kim, Hyung Wook Kim, Alexey Alexandrovych Serov, Youngtai Yoo, Kie Hyun Nam,