O-O2 Reaction

Two mechanisms have been suggested for reactions such as oxidation of CO  

An Eley-Rideal mechanism in which one of the components reacts in the adsorbed state with the other molecule in the gaseous or in a physically adsorbed state, e.g., 

It has been established (38) that the dominant mechanism of the reaction is the Langmuir-Hinshelwood (L-H) mechanism  

The alternative Eley-Rideal mechanism fails to explain all the experimental results. Direct evidence in favor of the L-H mechanism has been obtained 

---