期刊
SURFACE SCIENCE
卷 600, 期 23, 页码 5025-5040出版社
ELSEVIER SCIENCE BV
DOI: 10.1016/j.susc.2006.08.049
关键词
styrene oxidation; Ag(111); styrene oxide; benzene; benzoic acid
Temperature programmed reaction spectroscopy (TPRS), X-ray photoelectron spectroscopy (XPS), and reflection absorption infrared spectroscopy (RAIRS) were used to study the partial oxidation of styrene on Ag(111). Styrene oxide, benzene, and benzoic acid were identified as partially oxidized reaction products. XPS and RAIRS provide evidence for the formation of a styrene-derived surface oxametallacycle that either forms styrene oxide or is further oxidized in a branching reaction to form benzoate, which is the intermediate responsible for the formation of both benzene and benzoic acid. The strong dependence of the product distribution on oxygen coverage suggests that O monomers adsorbed on Ag(111) provide a higher selectivity for partial oxidation than oxygen from the Ag(111)-p(4 x 4)-O reconstruction. (c) 2006 Elsevier B.V. All rights reserved.
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