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Bulletin of the Korean Chemical Society (BKCS)

ISSN 0253-2964(Print)
ISSN 1229-5949(Online)
Volume 27, Number 12
BKCSDE 27(12)
December 20, 2006 

Interaction of SO2 with Oxygen on Ni(100) Studied by XPS and NEXAFS
Chang Min Kim
Ni, NiO, SO2, NEXAFS, Surface
The adsorption and surface reactions of SO2 on Ni(100), c(2x2)_O/Ni (100) and NiO(111)/Ni(100) surfaces have been investigated using X-ray photoelectron spectroscopy (XPS) and near-edge X-ray absorption fine structure (NEXAFS) technique. On Ni(100), chemisorbed SO2 is formed at 160 K. When SO2 is adsorbed on c(2x2)_O/Ni(100) at 160 K, SO2 reacts with oxygen to form SO3 and trace amount of SO4 species. SO3 is adsorbed on this surface with its C3 axis perpendicular to the surface. On a NiO(111)/Ni(100) surface, both SO3 and SO4 species are formed at 160 K from adsorbed SO2.
2037 - 2039
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