Electrochemical CO2 Reduction at Glassy Carbon Electrodes Functionalized by MnI and ReI Organometallic Complexes

Cunfa Sun, Laura Rotundo, Claudio Garino, Luca Nencini, Suk Goo Yoon, Roberto Gobetto, Carlo Nervi

Research output: Contribution to journalArticle

20 Citations (Scopus)

Abstract

The catalytic activities towards electrochemical CO2 reduction of two new rhenium and manganese complexes, namely fac-Mn(apbpy)(CO)3Br (1) and fac-Re(apbpy)(CO)3Cl (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 complexes 1 and 2 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.

Original languageEnglish
Pages (from-to)3219-3229
Number of pages11
JournalChemPhysChem
Volume18
Issue number22
DOIs
Publication statusPublished - 2017 Nov 17

Keywords

  • carbon dioxide
  • electrode functionalization
  • Mn complexes
  • Re complexes
  • reduction

ASJC Scopus subject areas

  • Atomic and Molecular Physics, and Optics
  • Physical and Theoretical Chemistry

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