caa a22 4500 378907859 CHVBK 20180305123534.0 cr unu---uuuuu 161128e20040801xx s 000 0 eng 10.1524/zpch.218.8.957.35981 doi (NATIONALLICENCE)gruyter-10.1524/zpch.218.8.957.35981 Adsorption and Reaction of Methanol on Clean and Oxygen Precovered Cu(111) [Elektronische Daten] [S. Pöllmann, A. Bayer, Ch. Ammon, Hans-Peter Steinrück] The adsorption of methanol on the clean and oxygen precovered Cu(111) surface was studied by means of high resolution X-ray photoelectron spectroscopy (XPS), ultraviolet photoelectron spectroscopy (UPS), and temperature programmed desorption (TPD). On clean Cu(111) methanol is adsorbed molecularly at 100K. Only small amounts of methoxy are formed by heating to 160-180K, whereas the main part of methanol desorbs molecularly. The formation of methoxy drastically increases on the oxygen precovered surface. In the UP spectra the peaks of molecular methanol disappear and the peaks of methoxy develop. TPD measurements show that methoxy desorbs dissociatively as formaldehyde and hydrogen with the rate maxima at around 430K. The efficiency of the oxidation of methanol to formaldehyde depends on the amount of predosed oxygen, with a maximum methoxy coverage obtained for an oxygen precoverage of 0.18ML. From the quantitative analysis we propose an additional reaction pathway involving not only the formation, but also the decomposition of an hydroxyl intermediate, parallel to the previously reported pathway, which leads to the desorption of water. © 2004 Oldenbourg Wissenschaftsverlag GmbH Thermodynamics & statistical physics nationallicence Laboratory techniques, experiments nationallicence Physical chemistry nationallicence Pöllmann S. aut Bayer A. aut Ammon Ch aut Steinrück Hans-Peter aut Zeitschrift für Physikalische Chemie/International journal of research in physical chemistry and chemical physics Oldenbourg Wissenschaftsverlag GmbH 218/8/2004(2004-08-01), 957-971 0942-9352 218:8/2004<957 2004 218 zpch https://doi.org/10.1524/zpch.218.8.957.35981 text/html Onlinezugriff via DOI 1 research article jats NATIONALLICENCE 856 40 https://doi.org/10.1524/zpch.218.8.957.35981 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Pöllmann S. aut NATIONALLICENCE 700 1- Bayer A. aut NATIONALLICENCE 700 1- Ammon Ch aut NATIONALLICENCE 700 1- Steinrück Hans-Peter aut NATIONALLICENCE 773 0- Zeitschrift für Physikalische Chemie/International journal of research in physical chemistry and chemical physics Oldenbourg Wissenschaftsverlag GmbH 218/8/2004(2004-08-01), 957-971 0942-9352 218:8/2004<957 2004 218 zpch CC0 http://creativecommons.org/publicdomain/zero/1.0 nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-gruyter