Molecular co-Corrole complex for the heterogeneous electrocatalytic reduction of carbon dioxide on carbon fiber electrodes

Description

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 (Co-corrole), which contains three polyethylene glycol residues attached at the meso-phenyl groups. The Co(III) ion in the center of the 18π-electronic macrocycle is electrochemically reduced to Co(I). 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 Co-corrole modified carbon paper electrode exhibits a Faradaic Efficiency (FE%) of 47 % towards ethanol production, a TON of 196 and a TOF of 0.011 s-1 at -0.8 V vs RHE over 5 hours measurement time.

Period	25 Sept 2019
Event title	18th Austrian Chemistry days
Event type	Conference
Location	AustriaShow on map