High performance Fe porphyrin/ionic liquid co-catalyst for electrochemical CO2 reduction

Authors

Jaecheol Choi, University of WollongongFollow
Tania Benedetti Goncales, University of WollongongFollow
Rouhollah Jalili, University of WollongongFollow
Ashley Walker, University of WollongongFollow
Gordon G. Wallace, University of WollongongFollow
David L. Officer, University of WollongongFollow

RIS ID

109780

Publication Details

Choi, J., Benedetti Goncales, T., Jalili, R., Walker, A., Wallace, G. G. & Officer, D. L. (2016). High performance Fe porphyrin/ionic liquid co-catalyst for electrochemical CO2 reduction. Chemistry: A European Journal, 22 (40), 14158-14161.

Abstract

The efficient and selective catalytic reduction of CO2 is a highly promising process for both of the storage of renewable energy as well as the production of valuable chemical feedstocks. In this work, we show that the addition of an ionic liquid, 1-butyl-3-methylimidazolium tetrafluoroborate, in an aprotic electrolyte containing a proton source and FeTPP, promotes the in situ formation of the [Fe0TPP]2− homogeneous catalyst at a less negative potential, resulting in lower overpotentials for the CO2 reduction (670 mV) and increased kinetics of electron transfer. This co-catalysis exhibits high Faradaic efficiency for CO production (93 %) and turnover number (2 740 000 after 4 hour electrolysis), with a four-fold increase in turnover frequency (TOF) when compared with the standard system without the ionic liquid.

Grant Number

ARC/CE140100012

Additional Grant Number

http://purl.org/au-research/grants/ARC/CE140100012