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Molecular cobalt corrole complex for the heterogeneous electrocatalytic reduction of carbon dioxide.
- Source :
- Nature Communications; 8/27/2019, Vol. 10 Issue 1, pN.PAG-N.PAG, 1p
- Publication Year :
- 2019
-
Abstract
- Electrochemical conversion of CO<subscript>2</subscript> 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. Electron-donation 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 d<superscript>8</superscript>-configurated metal centre, where two electrons occupy and fill up the antibonding d<subscript>z</subscript><superscript>2</superscript> 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 CO<subscript>2</subscript> to ethanol or methanol of an immobilized cobalt A<subscript>3</subscript>-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. Electrochemical conversion of carbon dioxide to ethanol is one of the most challenging energy conversion reactions. Here the authors show selective electroreduction of carbon dioxide to ethanol by using a functionalized cobalt A3-corrole catalyst immobilized on a carbon paper electrode. [ABSTRACT FROM AUTHOR]
Details
- Language :
- English
- ISSN :
- 20411723
- Volume :
- 10
- Issue :
- 1
- Database :
- Complementary Index
- Journal :
- Nature Communications
- Publication Type :
- Academic Journal
- Accession number :
- 138298318
- Full Text :
- https://doi.org/10.1038/s41467-019-11868-5