The Partial Oxidations of Cyclohexane and Benzene on the FeCl3 ‐ Embedded Cathode during the O 2 ‐ H 2 Fuel Cell Reactions

Abstract

Activation and partial oxidations of cyclohexane and benzene occur at ambient temperatures on cathodes containing various metal chlorides during fuel cell reactions. Among the metal chlorides embedded in graphite cathodes, was the most effective for enhancing the partial oxidation of cyclohexane into cyclohexanol and cyclohexanone. This cathode was also effective for the hydroxylation of benzene to phenol. The effects of various kinetic factors on the rate of oxidations of cyclohexane and benzene have been examined. The kinetic results have been explained in terms of the reaction mechanism proposed. It is suggested that the activation and partial oxidation of cyclohexane and aromatics are initiated by an active oxygen, O*, generated on the iron cations at the cathode due to the reduction of dioxygen during the fuel cell reactions. Experiments using as the oxidant have indicated that the cannot be a precursor of the active oxygen O*. The product distribution observed in the oxidation of toluene implies that the O* has a character more electrophilic than OH radicals.