کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
5012753 | 1462817 | 2017 | 15 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Performance of a novel non-platinum cathode catalyst for direct methanol fuel cells
ترجمه فارسی عنوان
عملکرد یک کاتالیزور کاتد غیر کاتالیزور جدید برای سلول های سوخت مستقیم متانول
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کلمات کلیدی
سلول سوخت مستقیم متانول، واکنش کاهش اکسیژن، کاتالیزور غیر پلاتین،
موضوعات مرتبط
مهندسی و علوم پایه
مهندسی انرژی
انرژی (عمومی)
چکیده انگلیسی
Currently, platinum is used as the cathode catalyst in direct methanol fuel cells (DMFCs). However, platinum reduces the number of active sites for the oxygen reduction reaction (ORR) due to the reaction between platinum and methanol and the strong adsorption of carbon monoxide molecules on the platinum surface, and in addition, platinum is very expensive. Hence, this study proposes cobalt phthalocyanine/carbon-tungsten oxide nanowires (W18O49) as a non-platinum catalyst for the cathode side of a DMFC. We determined the kinetic parameters of the catalyst and investigated the factors affecting the reaction. The factors involved in the examination of the significant parameters were the synthetic method, the pyrolysis temperature, the mass ratio of CoPc to carbon, the mass ratio of CoPc/C to tungsten hexachloride and the molarity of tungsten hexachloride. The optimum parameters were determined to be a pyrolysis temperature of 600 °C and a mass ratio of CoPc/C:WCl6 of 1.90. These conditions produced a peak potential at 0.63 V vs. RHE, a mass activity of 1.76 A gcatalystâ1 at 0.65 V, an average electron transfer number of 3.9 with water as the main product, and an electron transfer number of 3.9 at 0.65 V. Finally, the results showed that the non-platinum catalyst (which is less expensive than platinum) has similar characteristics to platinum. The single cell performance test showed that the power density is 9.0 mW cmâ2. The catalyst has comparable performance with other macrocycle catalysts with modified structures.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Energy Conversion and Management - Volume 145, 1 August 2017, Pages 293-307
Journal: Energy Conversion and Management - Volume 145, 1 August 2017, Pages 293-307
نویسندگان
N.A. Karim, S.K. Kamarudin, K.S. Loh,