Electrochemical CO2 Reduction at Glassy Carbon Electrodes Functionalized by MnI and ReI Organometallic Complexes. Issue 22 (18th August 2017)

• Record Type: Journal Article
• Authors: Sun, Cunfa; Rotundo, Laura; Garino, Claudio; Nencini, Luca; Yoon, Sam S.; Gobetto, Roberto; Nervi, Carlo
• Is Part Of: Chemphyschem. Volume 18:Issue 22(2017)
• Page Start: 3219
• Page End: 3229
• Publication Date: 2017-08-18
• Subjects: carbon dioxide -- electrode functionalization -- Mn complexes -- Re complexes -- reduction; Chemistry, Physical and theoretical -- Periodicals; 541.05
• DOI: 10.1002/cphc.201700739
• Languages: English
• ISSNs: 1439-4235

Abstract

Abstract: The catalytic activities towards electrochemical CO2 reduction of two new rhenium and manganese complexes, namely fac ‐Mn(apbpy)(CO)3 Br (1 ) and fac ‐ Re(apbpy)(CO)3 Cl (2 ) (apbpy=4‐(4‐aminophenyl)‐2, 2′‐bipyridine), in both homogeneous and heterogeneous phases are compared. A glassy carbon electrode (GCE ) surface has been functionalized with complexes1 and2 by two approaches: a) direct electrochemical oxidation of the amino group with formation of C−N bonds, and b) electrochemical reduction of the corresponding diazonium salts with formation of C−C bonds. The chemically modified GCEs show efficient conversion of CO2 into CO, with turnover numbers (TONs) about 60 times higher than those of the corresponding catalysts in homogeneous solutions, and in a much shorter time. Abstract : Electrochemical CO2 reduction by two new Re and Mn catalysts in homogeneous and heterogeneous phases is studied. A glassy carbon electrode (GCE) surface is functionalized with the two complexes by two different methods, leading to the formation of C−N and C−C chemical bonds. The chemically modified GCEs show efficient conversion of CO2 to CO, with turnover numbers about 60 times higher than those of the corresponding catalysts in homogeneous solutions.