Journal
JOURNAL OF THE AMERICAN CHEMICAL SOCIETY
Volume 136, Issue 20, Pages 7245-7248Publisher
AMER CHEMICAL SOC
DOI: 10.1021/ja5028716
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Funding
- Berlin Cluster of Excellence on Unifying Concepts in Catalysis [EXL 31411]
- Deutsche Forschungsgemeinschaft within the focus program on light-driven water oxidation [SPP1613, DA402/7-1]
- Institute for Advanced Studies in Basic Sciences
- National Elite Foundation
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A binuclear manganese molecular complex [(OH2)(terpy)Mn(mu-O)(2)Mn(terpy)(OH2)](3+) (1) is the most prominent structural and functional model of the water-oxidizing Mn complex operating in plants and cyanobacteria. Supported on montmorillonite clay and using Ce(IV) as a chemical oxidant, 1 has been reported to be one of the best Mn-based molecular catalysts toward water oxidation. By X-ray absorption spectroscopy and kinetic analysis of the oxygen evolution reaction, we show that [(OH2)(terpy)Mn(mu-O)(2)Mn(terpy)(OH2)](3+) is transformed into layered type Mn-oxide particles which are the actual water oxidation catalyst.
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