STUDIES ON OXIDATION OF CO ON Pd WITH A MOLECULAR BEAM TECHNIQUE

The kinetics of CO oxidation on Pd(poly) at UHV are studied with mixed modulated and unmodulated beams. Analysis of data in different temperature regions concludes a Langmuir-Hinshelwood (LH) mechanism for oxidation of CO on Pd (poly). The characteristics of mixed modulated beam and single modulated beam are compared and discussed. The effects of the proportion of P^o₂ to P_CO in the mixture on the characteristics were examined and discossed. Best fits to the rate constant parameters characterizing the reaction are given. This reaction proceeds with an activation energy E_LH=23.0±2.0kcal/mole.