کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
58604 47160 2006 6 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Size reduction of PtRu catalyst particle deposited on carbon support by addition of non-metallic elements
موضوعات مرتبط
مهندسی و علوم پایه مهندسی شیمی کاتالیزور
پیش نمایش صفحه اول مقاله
Size reduction of PtRu catalyst particle deposited on carbon support by addition of non-metallic elements
چکیده انگلیسی

Addition of non-metallic elements such as N, P and S was examined to reduce the catalyst particle size of PtRu deposited on a carbon support and to improve the catalytic performance. It was found that the addition of N, P and S reduced the size of PtRu catalyst particle and that P was the most effective additive on the size reduction. A well dispersed PtRu catalyst particle 2 nm in size was obtained by the addition of P. The maximum power density was observed to be 64 mW/cm2 in a passive state of direct methanol fuel cell (DMFC) at room temperature by using the PtRuP anode catalyst. The PtRuP catalyst retained the size independently with surface area of the carbon support. This made it possible to use a carbon support with low surface area (lower porosity), resulting in better accessibility by molecules on the noble metal particles which were deposited prior to the external surface in compared to the micropore walls. The maximum power density was improved from 44 to 64 mW/cm2 by using a less porous carbon support (140 m2/g).

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Catalysis Today - Volume 111, Issues 3–4, 15 February 2006, Pages 182–187
نویسندگان
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