A unimolecular reaction model approach to the study of desorption of carbon monoxide induced by chemical activation
✍ Scribed by H. Kang; K.H. Park; S.H. Suck Salk; C.W. Lee
- Publisher
- Elsevier Science
- Year
- 1992
- Tongue
- English
- Weight
- 433 KB
- Volume
- 193
- Category
- Article
- ISSN
- 0009-2614
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✦ Synopsis
A simple model based on the unimolecular reaction (RRKM) theory is described and used to calculate the desorption rate constant of carbon monoxide induced by the exoergic reaction between a gaseous oxygen atom and a surface carbon atom on nickel and platinum surfaces. We find that only a small number of neighbouring surface atoms may participate in the activated complex and are mainly responsible for energy quenching in chemically induced desorption. It is predicted that the desorption rate constant k,, decreases with increasing number of the neighbouring surface atoms n, exhibiting an approximately linear relationship between log k,, and n.