title: Electrocatalytic Reduction of Carbon Dioxide to Carbon Monoxide by a Polymerized Film of an Alkynyl-Substituted Rhenium(I) Complex.
abstract: The alkynyl-substituted ReIcomplex [Re(5,5'-bisphenylethynyl-2,2'-bipyridyl)(CO)3Cl] was immobilized by electropolymerization onto a Pt-plate electrode. The polymerized film exhibited electrocatalytic activity for the reduction of CO2to CO. Cyclic voltammetry studies and bulk controlled-potential electrolysis experiments were performed by using a CO2-saturated acetonitrile solution. The CO2reduction, determined by cyclic voltammetry, occurs at approximately -1150 mV versus the normal hydrogen electrode (NHE). Quantitative analysis by GC and IR spectroscopy was used to determine a Faradaic efficiency of approximately 33 % for the formation of CO. Both values of the modified electrode were compared to the performance of the homogenous monomer [Re(5,5'-bisphenylethynyl-2,2'-bipyridyl)(CO)3Cl] in acetonitrile. The polymer formation and its properties were studied by using SEM, AFM, and attenuated total reflectance (ATR) FTIR and UV/Vis spectroscopy.
authors: Linz Institute for Organic Solar Cells (LIOS), Institute of Physical Chemistry, Johannes Kepler University Linz (Austria) E-mail: Engelbert.Portenkirchner@jku.at.
authors: Engelbert
authors: E
authors: Portenkirchner
authors: Jacek
authors: J
authors: Gasiorowski
authors: Kerstin
authors: K
authors: Oppelt
authors: Stefanie
authors: S
authors: Schlager
authors: Clemens
authors: C
authors: Schwarzinger
authors: Helmut
authors: H
authors: Neugebauer
authors: Günther
authors: G
authors: Knör
authors: Niyazi Serdar
authors: NS
authors: Sariciftci
keywords: electrochemistry; heterogeneous catalysis; polymerization; reduction; rhenium
references: Chem Soc Rev. 2009 Jan;38(1):89-99
references: 19088968
references: ChemSusChem. 2008;1(1-2):26-58
references: 18605661
references: Top Curr Chem. 2011;303:151-84
references: 21526437
references: ACS Nano. 2010 Mar 23;4(3):1259-78
references: 20141175
references: Chemistry. 2009;15(3):568-78
references: 18924187
references: Chem Rev. 2001 Apr;101(4):953-96
references: 11709862
references: Adv Mater. 2011 May 24;23(20):2367-71
references: 21462372
references: Inorg Chem. 2010 Oct 18;49(20):9283-9
references: 20845978