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)
موضوعات مرتبط
مهندسی و علوم پایه مهندسی شیمی مهندسی شیمی (عمومی)
پیش نمایش صفحه اول مقاله
Study of adsorbed water on Pt during methanol oxidation by ATR-SEIRAS (surface-enhanced infrared absorption spectroscopy)
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 0.1 M methanol. The newly appeared adsorbed water with O-H stretching vibration around 3658 cm−1 co-exists with adsorbed CO derived from methanol and its consumption during oxidation of the adsorbed CO and increase of formate species above ca. 0.6 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
نویسندگان
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