ON THE DISSOCIATION OFO2ON ALKALI METALS

T. Greber, A. Morgante, S. Fichtner-Endruschat and G. Ertl
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T. Greber: Fritz-Haber-Institut der Max-Planck-Gesellschaft, Faradayweg 4–6, D-14195 Berlin, Germany
A. Morgante: Fritz-Haber-Institut der Max-Planck-Gesellschaft, Faradayweg 4–6, D-14195 Berlin, Germany
S. Fichtner-Endruschat: Fritz-Haber-Institut der Max-Planck-Gesellschaft, Faradayweg 4–6, D-14195 Berlin, Germany
G. Ertl: Fritz-Haber-Institut der Max-Planck-Gesellschaft, Faradayweg 4–6, D-14195 Berlin, Germany

Surface Review and Letters (SRL), 1995, vol. 02, issue 03, 273-277

Abstract: The reaction ofO2with Li and Cs films is accompanied by the emission of electrons. The variations of the initial yields with the velocity of the impinging molecules is exploited to access the dynamics of the adsorption process. The data are analyzed in terms of a model where chemisorption proceeds via an intermediate$O_2^{2-}$species. This$O_2^{2-}$state readily dissociates while the de-excitation of the resultingO−intoO2−may cause electron emission. From a comparison with experimentally observed electron yields the reaction time and velocity uptake of the products is accessed.

Date: 1995
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DOI: 10.1142/S0218625X95000285

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