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Study of adsorbed water on Pt during methanol oxidation by ATR-SEIRAS (surface-enhanced infrared absorption spectroscopy) by Hidenobu Shiroishi; Yusuke Ayato; Keiji Kunimatsu; Tatsuhiro Okada is a Engineering article available to read on EtoBox.

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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 HClO 4 in the presence of 0.1 M methanol. The newly appeared adsorbed water with O-H stretching vibration around 3658 cm À1 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.

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Author

Hidenobu Shiroishi; Yusuke Ayato; Keiji Kunimatsu; Tatsuhiro Okada

Publisher

Elsevier ; Elsevier BV (ISSN 1572-6657)

Published

2005

Language

EN

Field

Engineering (Physical Sciences)