Rapid catalytic water oxidation by a single site, Ru carbene catalyst |
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Authors: | Chen Zuofeng Concepcion Javier J Meyer Thomas J |
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Institution: | Department of Chemistry, University of North Carolina at Chapel Hill, Chapel Hill, NC 27599, USA. |
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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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