Continuous Carbon Dioxide Electroreduction to Concentrated Multi-carbon Products Using a Membrane Electrode Assembly

Christine M. Gabardo, Colin P. O'Brien, Jonathan P. Edwards, Christopher McCallum, Yi Xu, Cao Thang Dinh, Jun Li, Edward H. Sargent, David Sinton*

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

356 Scopus citations

Abstract

The advent of low-cost renewable electricity and rising atmospheric CO2 has led to a focus on electrochemical CO2 reduction as a means toward low-carbon-intensity fuels and chemical feedstocks. The conversion of CO2 into C2+ hydrocarbons and oxygenates (i.e., products containing two or more carbon atoms) is attractive in light of large global market demand for these high-energy-density products. A limited number of prior studies have focused on performance in the reaction rate regime above 100 mA cm−2 generally viewed as necessary for industrial deployment. In these works, gas diffusion electrodes are used in liquid electrolyte electrochemical flow cells, which suffer in system stability and/or energy efficiency. We overcome this issue by developing a membrane electrode assembly-based electrolyzer. The combined catalyst and system strategy produces concentrated gas and liquid products and maintains performance during long-term (100 h) uninterrupted operation.

Original languageEnglish (US)
Pages (from-to)2777-2791
Number of pages15
JournalJoule
Volume3
Issue number11
DOIs
StatePublished - Nov 20 2019

Keywords

  • CO electroreduction
  • anion exchange membrane
  • carbon utilization
  • catalysis
  • electrolyzer
  • ethanol
  • ethylene
  • gas diffusion electrodes
  • membrane electrode assembly
  • polymer electrolyte

ASJC Scopus subject areas

  • General Energy

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