کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
1284865 | 973099 | 2010 | 4 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Methanol electrooxidation at aged PtRu electrodeposits as an approach to understand the effects of time
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موضوعات مرتبط
مهندسی و علوم پایه
شیمی
الکتروشیمی
پیش نمایش صفحه اول مقاله
چکیده انگلیسی
In this work we investigate the catalytic activity of PtRu electrodeposits of distinct atomic composition towards methanol oxidation as a function of the “aging” of the electrodes. Electrochemical results show that those compositions containing more Ru present a peak of activity during the aging, whilst Pt-rich deposits present a continuous deactivation. Results are interpreted in terms of a progressive deactivation of Ru sites, which emulates a continuous change in the atomic composition. The maxima observed for the electrodeposits correspond to the time needed to attain compositions located in the range of good activity for methanol oxidation.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Power Sources - Volume 195, Issue 21, 1 November 2010, Pages 7221-7224
Journal: Journal of Power Sources - Volume 195, Issue 21, 1 November 2010, Pages 7221-7224
نویسندگان
Pamella Glajchman, Diogo H. Wordell, M. Janete Giz, Giuseppe A. Camara,