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- W2078168081 abstract "The adsorption of SO2 on Cu(100) has been studied by X-ray absorption fine structure measurements above both the oxygen and sulfur K edge. The analysis of the data for the (SO2 + O) phase formed after heating a condensed SO2 layer to 180 K shows that SO2 is adsorbed with its molecular plane parallel to the surface normal and that the co-adsorbed atomic oxygen is located in bridge sites. The data are not consistent with a single SO2 adsorption geometry. The molecules are bonded to the surface through the S atom and at least one O atom resulting in SCu bond lengths of about 2.3 Å and OCu bond lengths close to 2.0 Å. The polarisation-dependent OS distances of 1.42 Å for near-grazing and of 1.48 Å for normal X-ray incidence indicate an at least partial lengthening of the SO bonds on adsorption. The analysis of the data for the (SO + 2O) phase obtained after heating a condensed SO2 layer to about 280 K shows that the SO species are lying flat on the surface and bond to the substrate through both the S and O atom. The S atoms are located in hollow sites with a SCu bond length of 2.34 ± 0.05 Å whereas the O atoms are nearly bridging two Cu atoms with an OCu distance of 1.93 ± 0.05 Å. The intramolecular O-S bond length measures 1.41 ± 0.03 Å. Co-adsorbed atomic oxygen is located in bridge sites." @default.
- W2078168081 created "2016-06-24" @default.
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- W2078168081 date "1997-02-01" @default.
- W2078168081 modified "2023-09-27" @default.
- W2078168081 title "Structure determinations of SO2 and its decomposition product SO adsorbed on Cu(100) by use of X-ray absorption fine-structure measurements" @default.
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- W2078168081 doi "https://doi.org/10.1016/s0039-6028(96)01109-0" @default.
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