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Selective Oxidation of Propene at Cesium and Cesium‐modified Ag(100) Surfaces
Author(s) -
Carley Albert F.,
Chambers Alan,
Roberts M. Wyn,
Santra Ashok K.
Publication year - 1998
Publication title -
israel journal of chemistry
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.908
H-Index - 54
eISSN - 1869-5868
pISSN - 0021-2148
DOI - 10.1002/ijch.199800045
Subject(s) - chemistry , propene , dehydrogenation , caesium , x ray photoelectron spectroscopy , metal , inorganic chemistry , photochemistry , catalysis , organic chemistry , chemical engineering , engineering
The oxidation of propene at Ag(100), Ag(100)–Cs, and Cs surfaces has been investigated by X‐ray photoelectron spectroscopy in the temperature range 80–298 K. The atomically clean Ag(100) surface is unreactive, while cesium surfaces effect mainly dehydrogenation or selective oxidation with some metal–carbon bond formation, but with complete oxidation a minor pathway. Partially cesiated Ag(100) surfaces, on the other hand, result in complete oxidation to give surface carbonate at 160 K. Two key intermediates responsible for the alternative reaction pathways have been delineated through their very different, but characteristic, C(1s) spectra at 80 K.