CO<inf>2</inf> electroreduction to multicarbon products from carbonate capture liquid

Lee, G; Rasouli, AS; Lee, BH; Zhang, J; Won, DH; Xiao, YC; Edwards, JP; Lee, MG; Jung, ED; Arabyarmohammadi, F; Liu, H; Grigioni, I; Abed, J; Alkayyali, T; Liu, S; Xie, K; Miao, RK; Park, S; Dorakhan, R; Zhao, Y; O'Brien, CP; Chen, Z; Sinton, D; Sargent, E

CO<inf>2</inf> electroreduction to multicarbon products from carbonate capture liquid

Lee, G Rasouli, AS Lee, BH Zhang, J

Won, DH Xiao, YC Edwards, JP Lee, MG Jung, ED Arabyarmohammadi, F Liu, H Grigioni, I Abed, J Alkayyali, T Liu, S Xie, K Miao, RK Park, S Dorakhan, R Zhao, Y O'Brien, CP Chen, Z Sinton, D Sargent, E

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Publisher:: Elsevier
Publication Type:: Journal Article
Citation:: Joule, 2023, 7, (6), pp. 1277-1288
Issue Date:: 2023-06-21

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Field	Value	Language
dc.contributor.author	Lee, G
dc.contributor.author	Rasouli, AS
dc.contributor.author	Lee, BH
dc.contributor.author	Zhang, J https://orcid.org/0000-0001-5476-0134
dc.contributor.author	Won, DH
dc.contributor.author	Xiao, YC
dc.contributor.author	Edwards, JP
dc.contributor.author	Lee, MG
dc.contributor.author	Jung, ED
dc.contributor.author	Arabyarmohammadi, F
dc.contributor.author	Liu, H
dc.contributor.author	Grigioni, I
dc.contributor.author	Abed, J
dc.contributor.author	Alkayyali, T
dc.contributor.author	Liu, S
dc.contributor.author	Xie, K
dc.contributor.author	Miao, RK
dc.contributor.author	Park, S
dc.contributor.author	Dorakhan, R
dc.contributor.author	Zhao, Y
dc.contributor.author	O'Brien, CP
dc.contributor.author	Chen, Z
dc.contributor.author	Sinton, D
dc.contributor.author	Sargent, E
dc.date.accessioned	2024-03-04T02:53:40Z
dc.date.available	2024-03-04T02:53:40Z
dc.date.issued	2023-06-21
dc.identifier.citation	Joule, 2023, 7, (6), pp. 1277-1288
dc.identifier.issn	2542-4785
dc.identifier.issn	2542-4351
dc.identifier.uri	http://hdl.handle.net/10453/176051
dc.description.abstract	Alkali hydroxide systems capture CO2 as carbonate; however, generating a pure CO2 stream requires significant energy input, typically from thermal cycling to 900°C. What is more, the subsequent valorization of gas-phase CO2 into products presents additional energy requirements and system complexities, including managing the formation of (bi)carbonate in an electrolyte and separating unreacted CO2 downstream. Here, we report the direct electrochemical conversion of CO2, captured in the form of carbonate, into multicarbon (C2+) products. Using an interposer and a Cu/CoPc-CNTs electrocatalyst, we achieve 47% C2+ Faradaic efficiency at 300 mA cm−2 and a full cell voltage of 4.1 V. We report 56 wt % of C2H4 and no detectable C1 gas in the product gas stream: CO, CH4, and CO2 combined total below 0.9 wt % (0.1 vol %). This approach obviates the need for energy to regenerate lost CO2, an issue seen in prior CO2-to-C2+ reports.
dc.language	en
dc.publisher	Elsevier
dc.relation.ispartof	Joule
dc.relation.isbasedon	10.1016/j.joule.2023.05.003
dc.rights	info:eu-repo/semantics/openAccess
dc.subject.classification	34 Chemical sciences
dc.subject.classification	40 Engineering
dc.title	CO<inf>2</inf> electroreduction to multicarbon products from carbonate capture liquid
dc.type	Journal Article
utslib.citation.volume	7
pubs.organisational-group	University of Technology Sydney
pubs.organisational-group	University of Technology Sydney/Faculty of Science
pubs.organisational-group	University of Technology Sydney/Faculty of Science/School of Mathematical and Physical Sciences
utslib.copyright.status	open_access	*
dc.date.updated	2024-03-04T02:53:38Z
pubs.issue	6
pubs.publication-status	Published
pubs.volume	7
utslib.citation.issue	6

Abstract:

Alkali hydroxide systems capture CO2 as carbonate; however, generating a pure CO2 stream requires significant energy input, typically from thermal cycling to 900°C. What is more, the subsequent valorization of gas-phase CO2 into products presents additional energy requirements and system complexities, including managing the formation of (bi)carbonate in an electrolyte and separating unreacted CO2 downstream. Here, we report the direct electrochemical conversion of CO2, captured in the form of carbonate, into multicarbon (C2+) products. Using an interposer and a Cu/CoPc-CNTs electrocatalyst, we achieve 47% C2+ Faradaic efficiency at 300 mA cm−2 and a full cell voltage of 4.1 V. We report 56 wt % of C2H4 and no detectable C1 gas in the product gas stream: CO, CH4, and CO2 combined total below 0.9 wt % (0.1 vol %). This approach obviates the need for energy to regenerate lost CO2, an issue seen in prior CO2-to-C2+ reports.

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http://hdl.handle.net/10453/176051