Journal
JOURNAL OF ELECTROANALYTICAL CHEMISTRY
Volume 597, Issue 1, Pages 28-38Publisher
ELSEVIER SCIENCE SA
DOI: 10.1016/j.jelechem.2006.07.038
Keywords
ruthenium bipyridyl binuclear complexes; Ru-Ru bonded redox polymers; functionalized polypyrrole; electropolymerization; CO2 reduction electrocatalysis
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The bmuclear [Ru(bpy)(CO)(2)(CH3CN)](2)(2+) (bpy = 2,2'-bipyridine) complex is an excellent precursor for the formation of redox polymeric Ru-Ru bonded films [Ru(bPY)(CO)(2)], on electroactive surfaces by a two-electron reduction process. The resulting molecular cathodes are highly efficient electrocatalysts for the selective reduction of CO2 in pure aqueous media. In this paper, the simple in situ synthesis and the electrochemical behavior of a series of binuclear complexes [Ru(L)(CO)(2)(CH3CN)](2)(2+) (L = bipyridyl ligands substituted by one or more pyrrole groups) are reported. In addition, to generating [Ru(L)(CO)(2)], electropolymerization, anodic oxidation of the complexes allow the formation of functionalized polypyrrole films. The electrochemical properties of these films towards CO2 reduction have been also investigated. (c) 2006 Elsevier B.V. All rights reserved.
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