Enhancing the Electrochemical Reduction of CO2by Controlling the Flow Conditions: An Intermittent Flow Reduction System with a Boron-Doped Diamond Electrode

Irkham, Shinichi Nagashima, Mai Tomisaki, Yasuaki Einaga

Research output: Contribution to journalArticlepeer-review

1 Citation (Scopus)

Abstract

Electrochemical CO2 reduction using an intermittent flow cell system with boron-doped diamond (BDD) as the working electrode is presented. A stop-start motion of the flow conditions in the intermittent cell is created using a piston pump, and this considerably increases the rate of electrochemical conversion of CO2 to HCOOH compared to a continuous flow system. The system works by stopping the flow of the electrolytes at a controlled frequency, which allows for sufficient time for more CO2 anion radicals (intermediate species) to be reduced into HCOOH instead of being washed away from the surface of the electrode. The findings presented here provide an important basis from which the design of CO2 reduction systems for industrial-scale applications can be started.

Original languageEnglish
Pages (from-to)5298-5303
Number of pages6
JournalACS Sustainable Chemistry and Engineering
Volume9
Issue number15
DOIs
Publication statusPublished - 2021 Apr 19

Keywords

  • COreduction
  • boron-doped diamond (BDD)
  • flow cell
  • formic acid
  • intermittent cell

ASJC Scopus subject areas

  • Chemistry(all)
  • Environmental Chemistry
  • Chemical Engineering(all)
  • Renewable Energy, Sustainability and the Environment

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