Decomposition of methanol over oxidized and reduced copper surfaces studied by double modulation Fourier transform infrared reflection absorption spectroscopy

Adsorption and decomposition of methanol over oxidized and reduced copper surfaces with or without vapor phase were observed by double modulation Fourier transform infrared reflection adsorption spectroscopy (DM FT-IRAS). Over the oxidized copper surface, methanol is adsorbed to form a formate ion a...

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Bibliographic Details
Published in:Applied surface science 1989, Vol.35 (3), p.363-370
Main Authors: Sakata, Yoshihisa, Domen, Kazunari, Maruya, Ken-ichi, Onishi, Takaharu
Format: Article
Language:English
Subjects:
Applied sciences
Chemistry
Cross-disciplinary physics: materials science
rheology
Exact sciences and technology
General and physical chemistry
Materials science
Metals, semimetals and alloys
Metals. Metallurgy
Physics
Solid-gas interface
Specific materials
Surface physical chemistry
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Summary:Adsorption and decomposition of methanol over oxidized and reduced copper surfaces with or without vapor phase were observed by double modulation Fourier transform infrared reflection adsorption spectroscopy (DM FT-IRAS). Over the oxidized copper surface, methanol is adsorbed to form a formate ion and decomposes to CO 2 and H 2O at 423 K. Over the reduced copper surface, adsorbed species of methanol were physically adsorbed methanol, methoxide, and polyoxymethylene after the reaction at 473 K and measured at 300 K with the vapor phase. The decomposition products of methanol at 473 K are CO, H 2 and methylformate. The decomposition path of methanol over the oxidized and reduced Cu surfaces are discussed.
ISSN:0169-4332
1873-5584
DOI:10.1016/0169-4332(89)90018-4