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Aufsatz / Paper in SCI-Expanded-Zeitschrift

Using the Alkynyl-Substituted Rhenium(I) Complex (4,4′-Bisphenyl-Ethynyl-2,2′-Bipyridyl)Re(CO)3Cl as Catalyst for CO2 Reduction - Synthesis, Characterization, and Application

Portenkirchner E., Schlager S., Apaydin D., Oppelt K., Himmelsbach M., Egbe D., Neugebauer H., Knör G., Yoshida T., Sariciftci S.: Using the Alkynyl-Substituted Rhenium(I) Complex (4,4′-Bisphenyl-Ethynyl-2,2′-Bipyridyl)Re(CO)3Cl as Catalyst for CO2 Reduction - Synthesis, Characterization, and Application, in: Electrocatalysis, Volume 6, Page(s) 185, 2015.

BibTeX

@ARTICLE{
title = {Using the Alkynyl-Substituted Rhenium(I) Complex (4,4′-Bisphenyl-Ethynyl-2,2′-Bipyridyl)Re(CO)3Cl as Catalyst for CO2 Reduction - Synthesis, Characterization, and Application},
type = {Aufsatz / Paper in SCI-Expanded-Zeitschrift},
author = {Portenkirchner, Engelbert and Schlager, Stefanie and Apaydin, Dogukan and Oppelt, Kerstin and Himmelsbach, Markus and Egbe, Daniel Ayuk Mbi and Neugebauer, Helmut and Knör, Günther and Yoshida, Tsukasa and Sariciftci, Serdar Niyazi},
language = {EN},
abstract = {The synthesis, structure, photophysics, and spectroscopic characterization of an organometallic Rhenium multichromophore compound carrying a central 2,2′-bipyridyl acceptor moiety with additional phenylethynyl substituents conjugated at the 4,4′-positions of the acceptor ligands and its effect on the electron density of the central rhenium atom as metal center for CO2 reduction is reported. The results were compared to fac-(2,2′-bipyridyl)Re(CO)3Cl and fac-(5,5′-bisphenylethynyl- 2,2′-bipyridyl)Re(CO)3Cl. Cyclovoltammetric studies and rotating disk electrochemistry were performed for electrochemical characterization. Ultraviolet and visible (UV-vis) absorption, Fourier transform infrared (FTIR), and luminescence measurements were carried out for a spectroscopic characterization and compared to theoretical calculations at the density functional theory (DFT) level. In addition, the rhenium complex fac-(4,4′- bisphenyl-ethynyl-2,2′-bipyridyl)-Re(CO)3Cl was used as a novel catalyst for the electrochemical reduction of CO2 in homogeneous solution. Results showed an 11-fold increase in the current density under CO2 saturation and a catalytic second-order rate constant for CO formation of about 560M−1 s−1 on a Pt working electrode. For further characterization of the CO2 reduction capabilities, bulk controlled potential electrolysis experiments were performed using a CO2-saturated acetonitrile electrolyte solution. The headspace product gas analysis yields CO as main reduction product with faradaic efficiencies of about 12 % over 5-h electrolysis time.},
pages = {185},
journal = {Electrocatalysis},
volume = {6},
issn = {1868-2529},
year = {2015},
url = {http://www.lios.at},
}

Details

Zusammenfassung: The synthesis, structure, photophysics, and spectroscopic characterization of an organometallic Rhenium multichromophore compound carrying a central 2,2′-bipyridyl acceptor moiety with additional phenylethynyl substituents conjugated at the 4,4′-positions of the acceptor ligands and its effect on the electron density of the central rhenium atom as metal center for CO2 reduction is reported. The results were compared to fac-(2,2′-bipyridyl)Re(CO)3Cl and fac-(5,5′-bisphenylethynyl- 2,2′-bipyridyl)Re(CO)3Cl. Cyclovoltammetric studies and rotating disk electrochemistry were performed for electrochemical characterization. Ultraviolet and visible (UV-vis) absorption, Fourier transform infrared (FTIR), and luminescence measurements were carried out for a spectroscopic characterization and compared to theoretical calculations at the density functional theory (DFT) level. In addition, the rhenium complex fac-(4,4′- bisphenyl-ethynyl-2,2′-bipyridyl)-Re(CO)3Cl was used as a novel catalyst for the electrochemical reduction of CO2 in homogeneous solution. Results showed an 11-fold increase in the current density under CO2 saturation and a catalytic second-order rate constant for CO formation of about 560M−1 s−1 on a Pt working electrode. For further characterization of the CO2 reduction capabilities, bulk controlled potential electrolysis experiments were performed using a CO2-saturated acetonitrile electrolyte solution. The headspace product gas analysis yields CO as main reduction product with faradaic efficiencies of about 12 % over 5-h electrolysis time.

Journal: Electrocatalysis
Volume: 6
Erscheinungsjahr: 2015
Seitenreferenz: 185
Anzahl Seiten: 13
Web: http://www.lios.at
DOI: http://dx.doi.org/10.1007/s12678-014-0230-1
ISSN: 1868-2529
Reichweite: International

Beteiligte

AutorInnen / HerausgeberInnen: DI (FH) Engelbert Portenkirchner, Stefanie Schlager, MSc Dogukan Apaydin, DI Dr. Kerstin Oppelt, Assoz.Univprof. DI Dr. Markus Himmelsbach, Priv.-Doz. Dr. Daniel Ayuk Mbi Egbe, Ass.-Prof. Mag. Dr. Helmut Neugebauer, Univ.-Prof. Dr. Günther Knör, Tsukasa Yoshida, O.Univ.-Prof. Mag. Dr. Serdar Niyazi Sariciftci

Forschungseinheiten der JKU:

Wissenschaftszweige: 103011 Halbleiterphysik | 103040 Photonik | 104 Chemie | 104003 Anorganische Chemie | 104005 Elektrochemie | 104016 Photochemie | 104017 Physikalische Chemie

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