THE EFFECT OF EXCHANGE PROCESS ON THE KINETICS OF DESORPTION AND ADSORPTION OF CO ON RH(111) SURFACE

Authors
SONG Z LU RC LOU NQ ZHAI RS
Citation
Z. Song et al., THE EFFECT OF EXCHANGE PROCESS ON THE KINETICS OF DESORPTION AND ADSORPTION OF CO ON RH(111) SURFACE, Chemical physics letters, 217(1-2), 1994, pp. 142-145
Citations number
10
Categorie Soggetti
Physics, Atomic, Molecular & Chemical
Journal title
Chemical physics letters → ACNP
ISSN journal
00092614
Volume
217
Issue
1-2
Year of publication
1994
Pages
142 - 145
Database
ISI
SICI code
0009-2614(1994)217:1-2<142:TEOEPO>2.0.ZU;2-H
Abstract
Desorption kinetics of CO from Rh(111) surface has been studied using TPD and isotope switch techniques. Linear increase of absolute desorpt ion rate with ambient CO gas pressure was observed. The exchange proce ss of gas molecules with adsorbed molecules dominates the desorption k inetics. A kinetic model for direct exchange reaction to explain the d esorption enhancement by the ambient gas is in good agreement with exp eriment results. The effect of the exchange reaction on adsorption kin etics is discussed.