Oxidation of sulfur dioxide on Ag(110): vibrational study of the structure of intermediate complexes formed

Journal Article · Thu Aug 14 00:00:00 EDT 1986 · J. Phys. Chem.; (United States)

DOI:https://doi.org/10.1021/j100408a044· OSTI ID:5471571

Outka, D A; Madix, R J; Fisher, G B; DiMaggio, C

The vibrational spectra of intermediates formed in the low-pressure oxidation of SO/sub 2/ on the Ag(110) surface are investigated by electron energy loss vibrational spectroscopy. Sulfur dioxide first reacts with atomic oxygen on the Ag(110) surface at 241 K to form a SO/sub 3/ intermediate which is bonded to the surface by a single oxygen atom. This species irreversibly converts to a bidentate, oxygen-bonded species upon heating to 418 K. The SO/sub 3/ species disproportionates at 500 K to yield gaseous SO/sub 2/, adsorbed SO/sub 4/, and subsurface oxygen. The SO/sub 4/ is initially formed as a bi- or tridentate, oxygen-bonded species with C/sub s/ symmetry; it converts to a strictly bidentate species with C/sub 2nu/ symmetry upon heating to 815 K. The SO/sub 4/ decomposes above 873 K.

• Research Organization: Stanford Univ., CA
• OSTI ID: 5471571
• Journal Information: J. Phys. Chem.; (United States), Vol. 90:17
• Country of Publication: United States
• Language: English

Related Subjects

37 INORGANIC
ORGANIC
PHYSICAL AND ANALYTICAL CHEMISTRY
REACTION INTERMEDIATES
VIBRATIONAL STATES
SILVER
CATALYTIC EFFECTS
SULFUR OXIDES
OXIDATION
ENERGY-LOSS SPECTROSCOPY
EXPERIMENTAL DATA
MONOCRYSTALS
NORMAL-MODE ANALYSIS
CHALCOGENIDES
CHEMICAL REACTIONS
CRYSTALS
DATA
ELECTRON SPECTROSCOPY
ELEMENTS
ENERGY LEVELS
EXCITED STATES
INFORMATION
METALS
NUMERICAL DATA
OXIDES
OXYGEN COMPOUNDS
SPECTROSCOPY
SULFUR COMPOUNDS
TRANSITION ELEMENTS
400201* - Chemical & Physicochemical Properties