Electrochemical upgrade of CO2 from amine capture solution

Geonhui Lee, Yuguang C. Li, Ji-Yong Kim, Tao Peng, Dae-Hyun Nam, Armin Sedighian Rasouli, Fengwang Li, Mingchuan Luo, Alexander H. Ip, Young-Chang Joo and Edward H. Sargent ()
Additional contact information
Geonhui Lee: University of Toronto
Yuguang C. Li: University of Toronto
Ji-Yong Kim: Seoul National University
Tao Peng: University of Toronto
Dae-Hyun Nam: University of Toronto
Armin Sedighian Rasouli: University of Toronto
Fengwang Li: University of Toronto
Mingchuan Luo: University of Toronto
Alexander H. Ip: University of Toronto
Young-Chang Joo: Seoul National University
Edward H. Sargent: University of Toronto

Nature Energy, 2021, vol. 6, issue 1, 46-53

Abstract: Abstract CO2 capture technologies based on chemisorption present the potential to lower net emissions of CO2 into the atmosphere. The electrochemical upgrade of captured CO2 to value-added products would be particularly convenient. Here we find that this goal is curtailed when the adduct of the capture molecule with CO2 fails to place the CO2 sufficiently close to the site of the heterogeneous reaction. We investigate tailoring the electrochemical double layer to achieve the valorization of chemisorbed CO2 in an aqueous monoethanolamine electrolyte. We reveal, using electrochemical studies and in situ surface-enhanced Raman spectroscopy, that a smaller double layer distance correlates with improved activity for CO2 to CO from amine solutions. With the aid of an alkali cation and accelerated mass transport by system design—temperature and concentration—we demonstrate amine–CO2 conversion to CO with 72% Faradaic efficiency at 50 mA cm–2.

Date: 2021
References: Add references at CitEc
Citations: View citations in EconPapers (10)

Downloads: (external link)
https://www.nature.com/articles/s41560-020-00735-z Abstract (text/html)
Access to the full text of the articles in this series is restricted.

Related works:
This item may be available elsewhere in EconPapers: Search for items with the same title.

Export reference: BibTeX RIS (EndNote, ProCite, RefMan) HTML/Text

Persistent link: https://EconPapers.repec.org/RePEc:nat:natene:v:6:y:2021:i:1:d:10.1038_s41560-020-00735-z

Ordering information: This journal article can be ordered from
https://www.nature.com/nenergy/

DOI: 10.1038/s41560-020-00735-z

Access Statistics for this article

Nature Energy is currently edited by Fouad Khan

More articles in Nature Energy from Nature
Bibliographic data for series maintained by Sonal Shukla () and Springer Nature Abstracting and Indexing ().