Iron porphyrin for selective electrochemical reduction of CO2: Synthesis, characterization and effect of electrolyte

Amal BaQais, Hassan Ait Ahsaine

Research output: Contribution to journalArticlepeer-review

Abstract

The electrochemical CO2 reduction reaction to form valued by-products is a challenging and a sustainable process. In general, CO2 reduction to carbon neutral fuels requires selective and well-designed catalysts. Herein, we report perfluorinated iron porphyrin (FeFPor) for CO2-to-CO electroreduction in different bicarbonate electrolytes, byproducts distribution in lithium, sodium, potassium and cesium were analyzed. The immobilized FeFPor on the carbon microporous layer of the carbon cloth exhibited a high selectivity for carbon monoxide production over a wide range of potentials from −0.5 to −1 V vs. RHE in all bicarbonate solution with the NaHCO3 being the best catalytic medium. The highest conversion efficiency to CO production reached 97% at −0.5 V vs. RHE in 0.5 M NaHCO3 in near neutral aqueous solution (pH = 7.2). The CO electrosynthesis dropped when using lithium, potassium and cesium bicarbonates, which was due to the CO2 concentration and reactions at the inner electrode-solution reactions.
Original languageEnglish (US)
Pages (from-to)111360
JournalInorganic Chemistry Communications
Volume157
DOIs
StatePublished - Sep 9 2023
Externally publishedYes

Bibliographical note

KAUST Repository Item: Exported on 2023-09-18
Acknowledgements: Part of the characterizations were performed at King Abdullah University of Science and Technology (KAUST). The authors extend their appreciation to the Deputyship for Research & Innovation, Ministry of Education in Saudi Arabia for funding this research work through the project number RI-44-0859.
This publication acknowledges KAUST support, but has no KAUST affiliated authors.

ASJC Scopus subject areas

  • Materials Chemistry
  • Physical and Theoretical Chemistry
  • Inorganic Chemistry

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