An Upper Limit to O2 Evolution as Test for Radical and Nonradical Mechanisms for the Fenton Reaction by Mordechai L. Kremer

Author:Mordechai L. Kremer
Format: pdf
Tags: The origin of an upper limit to the amount of O2 evolved in the rapid reaction between Fe2+ and H2O2 was investigated at a high concentration of H2O2. Using a nonradical model, including the formation of a primary Fe2+–biperoxy complex with a diminished rate of formation of the active intermediate FeO2+, agreement has been reached for the first time with the experimental data obtained by Barb et al. A limited formation of O2 requires that a finite concentration of H2O2 should be present in the reaction mixture when [Fe2+] falls to zero. It has been shown that in Barb et al.’s model the condition for such a state ([Fe2+] = 0, [H2O2] > 0) does not exist. Free radical based models fail as mechanisms for the Fenton reaction., Fenton; H2O2; Fe2+; O2; free radicals; catalysis


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