The interaction of ethylene with surface carbonate and hydroxide intermediates on silver
1981; Elsevier BV; Volume: 71; Issue: 1 Linguagem: Inglês
10.1016/0021-9517(81)90203-7
ISSN1090-2694
Autores Tópico(s)Catalysis and Oxidation Reactions
ResumoThe surface chemistry of the intermediates formed from the adsorption of CO2 and H2O on an oxygen-atom-covered Ag(110) surface was investigated with surface spectroscopic techniques. Carbon dioxide complexed with adsorbed oxygen atoms to form a surface carbonate intermediate, and the associative adsorption of water led to the formation of surface hydroxides. CO2 adsorption on the oxygen atom covered Ag(110) surface produced two-dimensional rearrangements of the surface species. Ethylene was not found to react with CO3ads and OHads below room temperature, but did exhibit some reactivity toward CO3ads at room temperature. This investigation showed that the formation of CO3ads and OHads on the silver surface are responsible for the inhibiting effects of CO2 and H2O during ethylene oxidation over silver catalysts.
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