Electrogenerated polypyridyl ruthenium hydride and ligand activation for water reduction to hydrogen and acetone to iso-propanol
Literature Information
Zuofeng Chen, Christopher R. K. Glasson, Patrick L. Holland, Thomas J. Meyer
The complex [Ru(tpy)(bpy)(S)]2+ (tpy = 2,2′:6′,2′′-terpyridine, bpy = 2,2′-bipyridine, S = solvent) is an electrocatalyst for water or proton reduction to hydrogen and for reduction of acetone to iso-propanol in CH3CN. Electrocatalysis is initiated by sequential 1e− reductions at the tpy and bpy ligands followed by addition of water to give a ruthenium hydride intermediate. Significant rate enhancements for hydrogen evolution are observed with added weak acids, such as H2PO4−, for the latter, with a rate enhancement of 104 compared to water. The reactivity of the in situ electrogenerated hydride toward hydride transfer is promoted by ligand reduction.
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