کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
10275888 | 463406 | 2005 | 10 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Carbon supported Pt75M25 (MÂ =Â Co, Ni) alloys as anode and cathode electrocatalysts for direct methanol fuel cells
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کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
مهندسی شیمی
مهندسی شیمی (عمومی)
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چکیده انگلیسی
The behaviour of carbon supported Pt75M25 (MÂ =Â Co, Ni) electrocatalysts, both as anode and cathode materials, was investigated in direct methanol fuel cells (DMFCs) and compared to that of a pure Pt electrocatalyst on the same carbon support. The physical and morphological characteristics of these electrocatalysts were examined by XRD, XAS and TEM techniques. The performances of Pt75Ni25/C and Pt75Co25/C as cathode materials in DMFC were better than those of the same electrocatalysts as anode materials. When used as cathode materials the cell with Pt75Ni25/C showed a better performance than those with Pt/C or Pt75Co25/C both in terms of mass activity and specific activity. The performances of these electrocatalysts as anode materials in DMFC were similar to that of Pt. The enhanced performance of Pt75Ni25/C as cathode electrocatalyst was ascribed both to the improved activity for oxygen reduction and to the higher methanol tolerance of the alloy.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Electroanalytical Chemistry - Volume 580, Issue 1, 15 June 2005, Pages 145-154
Journal: Journal of Electroanalytical Chemistry - Volume 580, Issue 1, 15 June 2005, Pages 145-154
نویسندگان
E. Antolini, J.R.C. Salgado, E.R. Gonzalez,