Summary Abstract: The oxidation of carbon monoxide on the Pt(110)-(1×2) surface: The influence of the adlayer composition on the reaction dynamics

Abstract

We have developed and employed the technique of surface temperature modulation to examine the dynamics of the oxidation of Ca on the Pt(110)-(1×2) surface [2]. This technique permits a straightforward analysis of the energetics of elementary surface reactions even in the presence of strong nonlinearities, providing a decided advantage over competing techniques such as modulated molecular-beam reactive scattering. We shall emphasize here the coverage dependence of the kinetic rate parameters (Er and kr(2)Z)) that describe the elementary surface reaction CO(a) + O(a) → CO2 (g). These data will be compared briefly with results obtained previously concerning the coverage dependence of the energy retained in the translational [3] and internal [4,5] modes of the product CO2 molecule.