Diane Dickie - Electrocatalytic water oxidation with a manganese macrocyclic complex.

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      Lee, Wei-Tsung, Xu, Song, Munoz, Salvador, Dickie, Diane, Smith,   Jeremy. INOR-833-

      Abstract: A well-defined manganese complex with   a macrocyclic ligand was synthesized and characterized.   Electrocatalytic water oxidn. and O2 prodn. were carried out by   cyclic voltammetry and bulk electrolysis, resp. A   two-proton/one-electron process at high pH indicates that water   oxidn. involves proton-coupled electron transfer (PCET). The   Faradaic efficiency for O2 prodn. was measured at a const.   potential and was confirmed by oxygen sensor and gas anal.   Interestingly, the manganese complex with a modified macrocyclic   ligand does not show the ability for water oxidn. but instead   exhibits catalytic decompn. of hydrogen peroxide. Factors   responsible for the switch from water oxidn. and H2O2 decompn.   are proposed. [on SciFinder(R)]

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