Electrocatalytic Reduction of Carbon Dioxide to Carbon Monoxide by a Polymerized Film of an Alkynyl‐Substituted Rhenium(I) Complex. Issue 7 (12th April 2013)

• Record Type: Journal Article
• Authors: Portenkirchner, Engelbert; Gasiorowski, Jacek; Oppelt, Kerstin; Schlager, Stefanie; Schwarzinger, Clemens; Neugebauer, Helmut; Knör, Günther; Sariciftci, Niyazi Serdar
• Is Part Of: ChemCatChem. Volume 5:Issue 7(2013:Jul.)
• Page Start: 1790
• Page End: 1796
• Publication Date: 2013-04-12
• Subjects: Catalysis -- Periodicals; 541.39505
• DOI: 10.1002/cctc.201200904
• Languages: English
• ISSNs: 1867-3880

Abstract

<abstract abstract-type="main" xml:lang="en"> <title>Abstract</title> <p>The alkynyl‐substituted Re^I complex [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 CO₂ to CO. Cyclic voltammetry studies and bulk controlled‐potential electrolysis experiments were performed by using a CO₂‐saturated acetonitrile solution. The CO₂ reduction, 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.</p> </abstract>