کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
1284873 | 973099 | 2010 | 4 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Dependence on composition of electronic properties and stability of Pt–Fe/C catalysts for oxygen reduction
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کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
شیمی
الکتروشیمی
پیش نمایش صفحه اول مقاله
![عکس صفحه اول مقاله: Dependence on composition of electronic properties and stability of Pt–Fe/C catalysts for oxygen reduction Dependence on composition of electronic properties and stability of Pt–Fe/C catalysts for oxygen reduction](/preview/png/1284873.png)
چکیده انگلیسی
This work presents studies of electronic characteristics and alloy stability carried out for Pt–Fe/C catalysts of different compositions (10–50% Fe, in atoms) and same particle size. The electronic properties are characterized by in situ dispersive X-ray absorption spectroscopy (DXAS). The results show a steady decrease in Pt d-band occupancy as the amount of Fe in the alloy increases. The alloy stability is evaluated by prolonged potential cycling up to 1.0 V. Catalysts with Fe content up to 30% show good stabilities and keep their activities for oxygen reduction after prolonged cycling. In contrast, catalysts with Fe content above 30% suffer pronounced Fe leaching.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Power Sources - Volume 195, Issue 21, 1 November 2010, Pages 7255–7258
Journal: Journal of Power Sources - Volume 195, Issue 21, 1 November 2010, Pages 7255–7258
نویسندگان
A.R. Malheiro, J. Perez, H.M. Villullas,