The isotopic exchange reaction of oxygen on metal oxides

Two methods have been used to determine the individual rate constants of th e isotopic exchange reaction of oxygen on metal oxides. The best way to det ermine the three rate constants is to use the kinetic model of Klier and co -workers and fit the equations to the experimental data. The method of Tsuc hiya and co-workers can be used to check the results obtained by the method of Klier and co-workers. The three rate constants, R-0, R-1, and R-2, Of t he three different exchange mechanisms are determined for the period IV met al oxides at various temperatures. The rate constants are correlated with p arameters characterising the oxide, i.e. the position of the metal element in the periodic table and the average metal-oxygen bond strength. (C) 1999 Academic Press.