کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
6454133 1418811 2017 7 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
A hierarchical cathode catalyst layer architecture for improving the performance of direct methanol fuel cell
ترجمه فارسی عنوان
یک معماری لایه کاتالیست سلول سلولی سلولی برای بهبود عملکرد سلول سوختی مستقیم متانول
کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه مهندسی شیمی کاتالیزور
چکیده انگلیسی


- A novel MEA with hierarchical cathode catalyst layer (CL) is proposed.
- The MEA shows outstanding DMFC performance despite low Pt loading (1.0 mg cm−2).
- The MEA can maintain the high ORR activity of cathode despite the methanol crossover.

We report the fabrication of a hierarchical cathode catalyst layer (CL) for application in direct methanol fuel cells (DMFCs). The hierarchical CL, comprised of Pt black as the inner layer and Pt/C as the outer layer, has appropriate structural properties for DMFC cathode. The inner CL with compact structure decreases the CL thickness and prevent Pt sites from methanol contamination, and the cathode outer CL with porous structure increase the electrochemical active surface area. Consequently, the hierarchical cathode CL is able to offset the adverse effect of methanol crossover on the cathode performance by enhancing the Pt catalyst utilization for oxygen reduction reactions (ORR). Therefore, the newly developed membrane electrode assembly (MEA) can maintain the high ORR activity of the cathode catalysts despite the methanol crossover. At a high methanol concentration (3 M), it shows high maximum power density (0.156 W cm−2) despite only 1.0 mg cm−2 of Pt in the cathode CL.

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ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Applied Catalysis B: Environmental - Volume 209, 15 July 2017, Pages 91-97
نویسندگان
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