کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
7724289 | 1497587 | 2011 | 8 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Characterization and activity correlations of Pt bimetallic catalysts for low temperature fuel cells
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موضوعات مرتبط
مهندسی و علوم پایه
شیمی
الکتروشیمی
پیش نمایش صفحه اول مقاله
![عکس صفحه اول مقاله: Characterization and activity correlations of Pt bimetallic catalysts for low temperature fuel cells Characterization and activity correlations of Pt bimetallic catalysts for low temperature fuel cells](/preview/png/7724289.png)
چکیده انگلیسی
Oxygen reduction tests using a half cell in phosphoric acid solution at 190 °C show monotonic decreases of electrode activity as time elapses for pure Pt, PtW, PtCu, PtZr and PtMn, whereas the rest show an initial increase that is followed by monotonic decrease over time. More pertinent increase at the initial stage was observed for PtCr, PtFe and PtAg catalysts due to the surface roughening effect. Among many parameters tested, a good correlation was found between the mass activity (A/g Pt) and the Pt surface area (SCV) obtained from the coulombic charge of the strongly adsorbed hydrogen. The specific activity (μA/cm2 Pt) based on SCV (m2/g Pt) was within the range of 2.12 ± 0.14 for all the tested PtM bimetallic catalysts.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: International Journal of Hydrogen Energy - Volume 36, Issue 6, March 2011, Pages 4007-4014
Journal: International Journal of Hydrogen Energy - Volume 36, Issue 6, March 2011, Pages 4007-4014
نویسندگان
Yongwook Sung, Jungtae Hwang, Jong Shik Chung,