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Published on: August 31, 2018
Rapid catalytic water oxidation by a single site, Ru carbene catalyst
Zuofeng Chen1, Javier J Concepcion, Thomas J Meyer
1Department of Chemistry, University of North Carolina at Chapel Hill, Chapel Hill, NC 27599, USA.
Abstract:
Compared to earlier single site catalysts, greatly enhanced rates of electrocatalytic water oxidation by the Ru carbene catalyst [Ru(tpy)(Mebim-py)(OH(2))](2+) (tpy = 2,2':6',2''-terpyridine; Mebim-py = 3-methyl-1-pyridylbenzimidazol-2-ylidene) have been observed. The mechanism appears to be the same with proton coupled electron transfer (PCET) activation to Ru(V)=O(3+) followed by O-O coupling and further oxidation. An important factor in the enhanced reactivity of the carbene complex may come from increased driving force for the O-O bond forming step.
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