High Performance Fe Porphyrin/Ionic Liquid Co-catalyst for Electrochemical COReduction

Jaecheol Choi, Tania M. Benedetti, Rouhollah Jalili, Ashley Walker, Gordon G. Wallace, David L. Officer

Research output: Contribution to journalArticleResearchpeer-review

36 Citations (Scopus)

Abstract

The efficient and selective catalytic reduction of CO2is 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 CO2reduction (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.

Original languageEnglish
Pages (from-to)14158-14161
Number of pages4
JournalChemistry - A European Journal
Volume22
Issue number40
DOIs
Publication statusPublished - 1 Jan 2016
Externally publishedYes

Keywords

  • carbon dioxide reduction
  • electrocatalysis
  • electrochemistry
  • ionic liquids
  • iron tetraphenylporphyrin

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