Options
2019
Journal Article
Titel
Molecular cobalt corrole complex for the heterogeneous electrocatalytic reduction of carbon dioxide
Abstract
Electrochemical conversion of CO2 to alcohols is one of the most challenging methods of conversion and storage of electrical energy in the form of high-energy fuels. The challenge lies in the catalyst design to enable its real-life implementation. Herein, we demonstrate the synthesis and characterization of a cobalt(III) triphenylphosphine corrole complex, which contains three polyethylene glycol residues attached at the meso-phenyl groups. Electrondonation and therefore reduction of the cobalt from cobalt(III) to cobalt(I) is accompanied by removal of the axial ligand, thus resulting in a square-planar cobalt(I) complex. The cobalt(I) as an electron-rich supernucleophilic d8-configurated metal centre, where two electrons occupy and fill up the antibonding dz2 orbital. This orbital possesses high affinity towards electrophiles, allowing for such electronically configurated metals reactions with carbon dioxide. Herein, we report the potential dependent heterogeneous electroreduction of CO2 to ethanol or methanol of an immobilized cobalt A3-corrole catalyst system. In moderately acidic aqueous medium (pH = 6.0), the cobalt corrole modified carbon paper electrode exhibits a Faradaic Efficiency (FE%) of 48 % towards ethanol production.
Author(s)
Paul, Shounik
Eco-Friendly Applied Materials Laboratory (EFAML), Materials Science Centre, Department of Chemical Sciences, Mohanpur Campus, Indian Institute of Science Education and Research, Kolkata; Eco-Friendly Applied Materials Laboratory (EFAML), College of Chemistry, Central China Normal University
Sreekumar, S. Sreejith
Eco-Friendly Applied Materials Laboratory (EFAML), Materials Science Centre, Department of Chemical Sciences, Mohanpur Campus, Indian Institute of Science Education and Research, Kolkata; Eco-Friendly Applied Materials Laboratory (EFAML), College of Chemistry, Central China Normal University
Barman, Soumitra
Eco-Friendly Applied Materials Laboratory (EFAML), Materials Science Centre, Department of Chemical Sciences, Mohanpur Campus, Indian Institute of Science Education and Research, Kolkata; Eco-Friendly Applied Materials Laboratory (EFAML), College of Chemistry, Central China Normal University
De, Ratnadip
Eco-Friendly Applied Materials Laboratory (EFAML), Materials Science Centre, Department of Chemical Sciences, Mohanpur Campus, Indian Institute of Science Education and Research, Kolkata; Eco-Friendly Applied Materials Laboratory (EFAML), College of Chemistry, Central China Normal University
Müllegger, Stefan
Institute of Semiconductor and Solid State Physics, Johannes Kepler University Linz
Coskun, Halime
Institute of Physical Chemistry and Linz Institute of Organic Solar Cells, Johannes Kepler University Linz
Aljabour, Abdalaziz
Institute of Physical Chemistry and Linz Institute of Organic Solar Cells, Johannes Kepler University Linz
Stadler, Philipp
Institute of Physical Chemistry and Linz Institute of Organic Solar Cells, Johannes Kepler University Linz
Roy, Soumyajit
Eco-Friendly Applied Materials Laboratory (EFAML), Materials Science Centre, Department of Chemical Sciences, Mohanpur Campus, Indian Institute of Science Education and Research, Kolkata; Eco-Friendly Applied Materials Laboratory (EFAML), College of Chemistry, Central China Normal University