کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
182495 | 459429 | 2007 | 4 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Surface modified Pt/C as a methanol tolerant oxygen reduction catalyst for direct methanol fuel cells
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کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
مهندسی شیمی
مهندسی شیمی (عمومی)
پیش نمایش صفحه اول مقاله
چکیده انگلیسی
A new procedure has been successfully developed by which PtNx/C is synthesized to enhance methanol tolerance while maintaining a high catalytic activity for the oxygen-reduction reaction (ORR). The nitrogen-modified Pt surface, which is prepared using a chelating agent followed by heat treatment, exhibits considerable selectivity toward the ORR in the presence of methanol. The high methanol tolerance could be attributed to the suppression of methanol adsorption resulting from the modification of the Pt surface with nitrogen. A direct methanol fuel-cell (DMFC) test showed that a power density of up to 120 m W cm−2 was generated when PtNx/C was used as the cathode catalyst (1 mg cm−2) in 6 M methanol and oxygen at 70 °C.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Electrochemistry Communications - Volume 9, Issue 10, October 2007, Pages 2629–2632
Journal: Electrochemistry Communications - Volume 9, Issue 10, October 2007, Pages 2629–2632
نویسندگان
Jong-Gil Oh, Chang-Ha Lee, Hansung Kim,