An XPS study of molecularly chemisorbed oxygen on Ag(111)
1986; Elsevier BV; Volume: 173; Issue: 2-3 Linguagem: Inglês
10.1016/0167-2584(86)90808-x
ISSN1878-1047
Autores Tópico(s)Electrocatalysts for Energy Conversion
ResumoAn adsorbed oxygen species on Ag(111) which desorbs as O2 at ∽ 217 K has been examined by X-ray photoelectron spectroscopy. Its O(1s) spectrum differs significantly from the "peroxolike" O2-2,a species of Ag(110), which also desorbs near 200 K. The differences suggest that this species is more "superoxo-like" (O-2,a) in nature. Implications of this result for the mechanism of catalytic ethylene oxidation over Ag are discussed.
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