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Issue 40, 2013
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Mechanism, decomposition pathway and new evidence for self-healing of manganese oxides as efficient water oxidizing catalysts: new insights

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Abstract

The electrochemical water-oxidation reaction usually requires a catalyst to reduce the overpotential and Earth-abundant catalysts, like MnO2, are attracting much attention. Here we use chemometric analysis, EPR and UV-Vis spectroscopies to track Mn(II) and MnO4 byproducts to the reaction of a MnO2 film in the presence of cerium(IV) ammonium nitrate. Permanganate ion is involved in at least two key reactions: it may oxidize water to O2 or can combine with Mn(II) to remake MnO2 solid. We propose mechanisms for water oxidation and present a self-healing process for this reaction.

Graphical abstract: Mechanism, decomposition pathway and new evidence for self-healing of manganese oxides as efficient water oxidizing catalysts: new insights

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Publication details

The article was received on 29 May 2013, accepted on 24 Jul 2013 and first published on 30 Jul 2013


Article type: Paper
DOI: 10.1039/C3DT51406D
Citation: Dalton Trans., 2013,42, 14603-14611
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    Mechanism, decomposition pathway and new evidence for self-healing of manganese oxides as efficient water oxidizing catalysts: new insights

    M. M. Najafpour, M. Kompany-Zareh, A. Zahraei, D. Jafarian Sedigh, H. Jaccard, M. Khoshkam, R. D. Britt and W. H. Casey, Dalton Trans., 2013, 42, 14603
    DOI: 10.1039/C3DT51406D

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