کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
7724997 | 1497836 | 2018 | 10 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Highly active PtxPdy/SnO2/C catalyst for dimethyl ether oxidation in fuel cells
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کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
شیمی
الکتروشیمی
پیش نمایش صفحه اول مقاله
چکیده انگلیسی
Dimethyl ether (DME) is a nontoxic gas that is considered a potential fuel for direct-feed proton exchange membrane fuel cells (PEMFCs). DME has several advantages over other fuels, including high energy density, pumpless fuel delivery, liquefied storage, low toxicity and minimal crossover through Nafion® membranes in PEMFC. However, the low activity of the state-of-the-art catalyst (Pt50Ru50) for DME oxidation is the main hurdle in the development of efficient fuel cell devices. In this work, fine layers of SnO2 on high surface-area carbon (PtxPdy/SnO2/C) catalysts were synthesized by ethylene glycol-assisted reduction and characterized by X-ray diffraction, TEM, EDX, XPS, and ICP-OES. The electro-oxidation of DME was systematically studied in a conventional three-electrode cell and a laboratory prototype direct DME fuel cell (DDMEFC) operating at 70â¯Â°C. Compared to other catalysts reported for DME oxidation, the Pt0.75Pd0.25/SnO2/C shows higher specific power density in both the conventional three-electrode cell and the fuel cell configurations. The peak power density delivered by direct gas feed DDMEFCs is 110â¯mWâ¯cm-2â¯at 0.4â¯V with only 1.2â¯mgâ¯cmâ2 of platinum group metal (PGM) loading.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Power Sources - Volume 396, 31 August 2018, Pages 335-344
Journal: Journal of Power Sources - Volume 396, 31 August 2018, Pages 335-344
نویسندگان
Diwakar Kashyap, Hanan Teller, Alex Schechter,