کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
9760416 | 1498048 | 2005 | 7 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Preparation of carbon-supported PtRu nanoparticles for direct methanol fuel cell applications - a comparative study
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کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
شیمی
الکتروشیمی
پیش نمایش صفحه اول مقاله
![عکس صفحه اول مقاله: Preparation of carbon-supported PtRu nanoparticles for direct methanol fuel cell applications - a comparative study Preparation of carbon-supported PtRu nanoparticles for direct methanol fuel cell applications - a comparative study](/preview/png/9760416.png)
چکیده انگلیسی
Carbon-supported PtRu nanoparticles were prepared by different methods that involve the simultaneous chemical reduction of H2PtCl6 and RuCl3 by NaBH4 at room temperature (PtRu-1), by ethanol under reflux (PtRu-2), and by the thermal decomposition of a single-source molecular precursor [(bipy)3Ru] (PtCl6) (PtRu-3). Transmission electron microscopy (TEM) examinations show that the mean diameter of the PtRu nanoparticles is lowest for PtRu-1 followed by PtRu-2 and PtRu-3. Measurements of electrocatalytic properties, however, reveal a different trend, namely: PtRu-3Â >Â PtRu-1Â >Â PtRu-2. This is attributed to the formation of a more homogenous alloy nanoparticle system from the thermolysis of the single-source molecular precursor. All three catalysts are more active than commercially available E-TEK (20Â wt.%) Pt catalyst. PtRu-3 also displays the highest tolerance to carbon monoxide. Heat treatment of PtRu-1 and PtRu-2 only marginally affects their electrocatalytic performance, whereas the co-reduction of H2PtCl6 and RuCl3 under alkaline conditions has more adverse outcomes.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Power Sources - Volume 142, Issues 1â2, 24 March 2005, Pages 43-49
Journal: Journal of Power Sources - Volume 142, Issues 1â2, 24 March 2005, Pages 43-49
نویسندگان
T.C. Deivaraj, Jim Yang Lee,