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; Edward H. Sargent

doi:10.1038/s41560-020-00735-z

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, Edward H. Sargent^*

^*Corresponding author for this work

Chemistry

Research output: Contribution to journal › Article › peer-review

172 Scopus citations

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.

Original language	English (US)
Pages (from-to)	46-53
Number of pages	8
Journal	Nature Energy
Volume	6
Issue number	1
DOIs	https://doi.org/10.1038/s41560-020-00735-z
State	Published - Jan 2021

ASJC Scopus subject areas

Electronic, Optical and Magnetic Materials
Renewable Energy, Sustainability and the Environment
Fuel Technology
Energy Engineering and Power Technology

UN SDGs

This output contributes to the following UN Sustainable Development Goals (SDGs)

Access to Document

10.1038/s41560-020-00735-z

Cite this

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title = "Electrochemical upgrade of CO2 from amine capture solution",

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.",

author = "Geonhui Lee and Li, {Yuguang C.} and Kim, {Ji Yong} and Tao Peng and Nam, {Dae Hyun} and {Sedighian Rasouli}, Armin and Fengwang Li and Mingchuan Luo and Ip, {Alexander H.} and Joo, {Young Chang} and Sargent, {Edward H.}",

note = "Funding Information: We acknowledge the support of the Ontario Research Fund and the Natural Sciences and Engineering Research Council (NSERC) of Canada. This research was supported by the Creative Materials Discovery Program through the National Research Foundation of Korea (NRF) funded by the Ministry of Science, ICT and Future Planning (2017M3D1A1040689). Publisher Copyright: {\textcopyright} 2020, The Author(s), under exclusive licence to Springer Nature Limited.",

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AU - Lee, Geonhui

AU - Li, Yuguang C.

AU - Kim, Ji Yong

AU - Peng, Tao

AU - Nam, Dae Hyun

AU - Sedighian Rasouli, Armin

AU - Li, Fengwang

AU - Luo, Mingchuan

AU - Ip, Alexander H.

AU - Joo, Young Chang

AU - Sargent, Edward H.

N1 - Funding Information: We acknowledge the support of the Ontario Research Fund and the Natural Sciences and Engineering Research Council (NSERC) of Canada. This research was supported by the Creative Materials Discovery Program through the National Research Foundation of Korea (NRF) funded by the Ministry of Science, ICT and Future Planning (2017M3D1A1040689). Publisher Copyright: © 2020, The Author(s), under exclusive licence to Springer Nature Limited.

PY - 2021/1

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N2 - 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.

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