Glycerol Oxidation Pairs with Carbon Monoxide Reduction for Low-Voltage Generation of C2and C3Product Streams

Hossein Yadegari, Adnan Ozden, Tartela Alkayyali, Vikram Soni, Arnaud Thevenon, Alonso Rosas-Hernández, Theodor Agapie, Jonas C. Peters, Edward H. Sargent, David Sinton*

*Corresponding author for this work

Research output: Contribution to journal/Conference contribution in journal/Contribution to newspaperLetterpeer-review

Abstract

Electrochemical carbon dioxide reduction to multicarbon products provides the storage of renewable energy in the form of chemical bonds, as well as a means to displace fossil sources of chemical feedstocks. However, the accompanying anodic oxygen evolution reaction (OER) reduces the energy efficiency of the process without providing a salable product. Replacing OER with alternative organic oxidation reactions (OORs) is an emerging strategy to reduce the full-cell potential and generate valuable products on both sides of the cell. We pursue carbon monoxide reduction that avoids carbonate formation and benefits from highly alkaline anode conditions favorable for OOR. This coelectrolysis strategy achieves a cathodic C2+ product stream (71% FE) and an anodic C3 product stream (75% FE) at 180 mA cm-2 with a full-cell potential of 1.34 V. The integrated system reduces the CO-to-C2H4 energy requirement by 55% (to ∼72 GJ/ton_C2H4), halving the projected energy cost of ethylene production from CO2.

Original languageEnglish
JournalACS Energy Letters
Volume6
Issue10
Pages (from-to)3538-3544
Number of pages7
DOIs
Publication statusPublished - Oct 2021
Externally publishedYes

Keywords

  • ACID
  • CO2 ELECTROREDUCTION
  • ELECTROLYSIS
  • VALORIZATION

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