Mechanism of Water Oxidation by Ferrate(VI) at pH 7 – 9.
DFT calculations, diferrate, ferrate, O−O coupling, water oxidation
The kinetics of water oxidation by K2FeO4 has been reinvestigated by UV/Vis spectrophotometry from pH 7–9 in 0.2 m phosphate buffer. The rate of reaction was found to be second‐order in both [FeO42−] and [H+]. These results are consistent with a proposed mechanism in which the first step involves the initial equilibrium protonation of FeO42− to give FeO3(OH)−, which then undergoes rate‐limiting O−O bond formation. Analysis of the O2 isotopic composition for the reaction in H218O suggests that the predominant pathway for water oxidation by ferrate is intramolecular O−O coupling. DFT calculations have also been performed, which support the proposed mechanism.
Chemistry - A European Journal
Chen, G.,Lam, W. W.,Lo, P.,Man, W.,Chen, L.,Lau, K.,& Lau, T. (2018). Mechanism of Water Oxidation by Ferrate(VI) at pH 7 – 9.. Chemistry - A European Journal, 24 (70), 18735-18742. http://dx.doi.org/10.1002/chem.201803757