کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
10275805 | 463395 | 2005 | 7 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Study of adsorbed water on Pt during methanol oxidation by ATR-SEIRAS (surface-enhanced infrared absorption spectroscopy)
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کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
مهندسی شیمی
مهندسی شیمی (عمومی)
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چکیده انگلیسی
Potential dependence of adsorbed water, CO species, formate and perchlorate ions on polycrystalline Pt electrode chemically deposited on a Si substrate has been investigated by in situ ATR-SEIRAS (surface-enhanced infrared absorption spectroscopy) in 0.1 M HClO4 in the presence of 0.1Â M methanol. The newly appeared adsorbed water with O-H stretching vibration around 3658Â cmâ1 co-exists with adsorbed CO derived from methanol and its consumption during oxidation of the adsorbed CO and increase of formate species above ca. 0.6Â V is demonstrated in a quantitative way by a linear relationship between the intensity of the adsorbed water and those of linear CO and formate. This can be interpreted as a strong proof that the water molecules which appeared upon methanol adsorption and co-exist with the resultant CO is in fact the species which react with the CO and promotes further methanol oxidation.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Electroanalytical Chemistry - Volume 581, Issue 1, 15 July 2005, Pages 132-138
Journal: Journal of Electroanalytical Chemistry - Volume 581, Issue 1, 15 July 2005, Pages 132-138
نویسندگان
Hidenobu Shiroishi, Yusuke Ayato, Keiji Kunimatsu, Tatsuhiro Okada,