کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
7712405 | 1497422 | 2016 | 9 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Development of highly-active and stable Pt/C catalyst for polymer electrolyte membrane fuel cells under simulated start-up/shut-down cycling
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کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
شیمی
الکتروشیمی
پیش نمایش صفحه اول مقاله
چکیده انگلیسی
Activated carbon composite support (ACCS) is synthesized using a novel methodology developed at University of South Carolina (USC). The ACCS shows good thermal stability similar to that of carbon nanofibers (CNFs). Pt/ACCS catalyst shows excellent support stability under simulated start-up/shut-down operating conditions (1.0-1.5Â V, 5000 cycles). The Pt/ACCS shows a maximum power density of 722Â mWÂ cmâ2 while commercial Pt/C and Pt/290G catalysts show 495 and 530Â mWÂ cmâ2, respectively. Furthermore, Pt/ACCS shows no loss of mass activity and maximum power density after 5000 cycles at 1.0-1.5Â V. The commercial Pt/C and Pt/290G catalysts show drastic mass activity losses (57.5% and 66.2%, respectively) and maximum power density losses (88.7% and 84.0%, respectively). The good activity and excellent stability of Pt/ACCS catalyst are attributed to the higher degree of graphitization and enhanced hydrophobicity of ACCS. For the first time, we report a carbon-based support which is stable under simulated start-up/shut-down operating conditions.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: International Journal of Hydrogen Energy - Volume 41, Issue 3, 21 January 2016, Pages 1828-1836
Journal: International Journal of Hydrogen Energy - Volume 41, Issue 3, 21 January 2016, Pages 1828-1836
نویسندگان
Taekeun Kim, Branko N. Popov,