O2(1Δg) Deactivation on O2-adsorbed Metal Surfaces

A flow system was set up to measure the quenching probability γ of O2(1Δg) on various O2-adsorbed metal surfaces including Cu, Cr, Ni, and Ag. γ increased with both the duration of the experiment and the O2(1Δg) concentration. After several hours evacuation to a few Pa, γ can return to its original...

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Bibliographic Details
Published inChinese journal of chemical physics Vol. 24; no. 3; pp. 256 - 260
Main Authors Du, Shu-yan, Leng, Jing, Yang, He-ping, Sha, Guo-he, Zhang, Cun-hao
Format Journal Article
LanguageEnglish
Published 01.06.2011
Subjects
Surface quenching
Singlet oxygen
Deactivation probability
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Summary:A flow system was set up to measure the quenching probability γ of O2(1Δg) on various O2-adsorbed metal surfaces including Cu, Cr, Ni, and Ag. γ increased with both the duration of the experiment and the O2(1Δg) concentration. After several hours evacuation to a few Pa, γ can return to its original value. A deactivation mechanism of O2(1Δg) is suggested by considering first the weak chemisorption of O2(1Δg) on the surface adsorption sites, followed by the near resonant energy transfer between the gas phase O2(1Δg) and surface O2(3Σ− g). A phenomenological model in accord with the experimental fact has been proposed together with relevant kinetic equations.
ISSN:1674-0068
2327-2244
DOI:10.1088/1674-0068/24/03/256-260