AVS 52nd International Symposium
    Surface Science Monday Sessions
       Session SS1-MoM

Paper SS1-MoM7
Selective Oxidation of Hydrocarbons on Chemisorbed Oxygen Covered Au(111)

Monday, October 31, 2005, 10:20 am, Room 202

Session: Catalytic Chemistry of Hydrocarbons
Presenter: X. Deng, Harvard University
Authors: X. Deng, Harvard University
C.M. Friend, Harvard University
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Chemisorbed oxygen covered Au(111) has been found to be active for the partial oxidation of hydrocarbons. Specifically, chemisorbed oxygen on a herringbone-Au(111) was deposited via electron-induced dissociation of NO2. Several hydrocarbons, including cyclohexene and styrene, were studied on the O/Au surface by using temperature programmed desorption (TPD) and high-resolution electron energy loss spectroscopy (HREELS). The primary products are styrene epoxide and benzene for styrene and cyclohexene oxidation, respectively. HREELS was performed to identify the intermediates of the reactions. In combination with the observed isotope effects, the reaction mechanisms on O/Au(111) were proposed and compared with those on O/Ag(110).