Journal
DALTON TRANSACTIONS
Volume 42, Issue 40, Pages 14603-14611Publisher
ROYAL SOC CHEMISTRY
DOI: 10.1039/c3dt51406d
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Funding
- Institute for Advanced Studies in Basic Sciences
- National Elite Foundation
- NSF [CHE-1213699, EAR-1231322]
- Direct For Mathematical & Physical Scien [1213699] Funding Source: National Science Foundation
- Division Of Chemistry [1213699] Funding Source: National Science Foundation
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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 O-2 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.
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