Surface hydroxide promotes CO2 electrolysis to ethylene in acidic conditions.

Cao, Y; Chen, Z; Li, P; Ozden, A; Ou, P; Ni, W; Abed, J; Shirzadi, E; Zhang, J; Sinton, D; Ge, J; Sargent, EH

Surface hydroxide promotes CO2 electrolysis to ethylene in acidic conditions.

Cao, Y Chen, Z Li, P Ozden, A Ou, P Ni, W Abed, J Shirzadi, E Zhang, J

Sinton, D Ge, J Sargent, EH

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Publisher:: NATURE PORTFOLIO
Publication Type:: Journal Article
Citation:: Nat Commun, 2023, 14, (1), pp. 2387
Issue Date:: 2023-04-25

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Field	Value	Language
dc.contributor.author	Cao, Y
dc.contributor.author	Chen, Z
dc.contributor.author	Li, P
dc.contributor.author	Ozden, A
dc.contributor.author	Ou, P
dc.contributor.author	Ni, W
dc.contributor.author	Abed, J
dc.contributor.author	Shirzadi, E
dc.contributor.author	Zhang, J https://orcid.org/0000-0001-5476-0134
dc.contributor.author	Sinton, D
dc.contributor.author	Ge, J
dc.contributor.author	Sargent, EH
dc.date.accessioned	2024-03-04T05:32:58Z
dc.date.available	2023-04-05
dc.date.available	2024-03-04T05:32:58Z
dc.date.issued	2023-04-25
dc.identifier.citation	Nat Commun, 2023, 14, (1), pp. 2387
dc.identifier.issn	2041-1723
dc.identifier.issn	2041-1723
dc.identifier.uri	http://hdl.handle.net/10453/176079
dc.description.abstract	Performing CO2 reduction in acidic conditions enables high single-pass CO2 conversion efficiency. However, a faster kinetics of the hydrogen evolution reaction compared to CO2 reduction limits the selectivity toward multicarbon products. Prior studies have shown that adsorbed hydroxide on the Cu surface promotes CO2 reduction in neutral and alkaline conditions. We posited that limited adsorbed hydroxide species in acidic CO2 reduction could contribute to a low selectivity to multicarbon products. Here we report an electrodeposited Cu catalyst that suppresses hydrogen formation and promotes selective CO2 reduction in acidic conditions. Using in situ time-resolved Raman spectroscopy, we show that a high concentration of CO and OH on the catalyst surface promotes C-C coupling, a finding that we correlate with evidence of increased CO residence time. The optimized electrodeposited Cu catalyst achieves a 60% faradaic efficiency for ethylene and 90% for multicarbon products. When deployed in a slim flow cell, the catalyst attains a 20% energy efficiency to ethylene, and 30% to multicarbon products.
dc.format	Electronic
dc.language	eng
dc.publisher	NATURE PORTFOLIO
dc.relation.ispartof	Nat Commun
dc.relation.isbasedon	10.1038/s41467-023-37898-8
dc.rights	info:eu-repo/semantics/closedAccess
dc.title	Surface hydroxide promotes CO2 electrolysis to ethylene in acidic conditions.
dc.type	Journal Article
utslib.citation.volume	14
utslib.location.activity	England
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	closed_access	*
dc.date.updated	2024-03-04T05:32:57Z
pubs.issue	1
pubs.publication-status	Published online
pubs.volume	14
utslib.citation.issue	1

Abstract:

Performing CO2 reduction in acidic conditions enables high single-pass CO2 conversion efficiency. However, a faster kinetics of the hydrogen evolution reaction compared to CO2 reduction limits the selectivity toward multicarbon products. Prior studies have shown that adsorbed hydroxide on the Cu surface promotes CO2 reduction in neutral and alkaline conditions. We posited that limited adsorbed hydroxide species in acidic CO2 reduction could contribute to a low selectivity to multicarbon products. Here we report an electrodeposited Cu catalyst that suppresses hydrogen formation and promotes selective CO2 reduction in acidic conditions. Using in situ time-resolved Raman spectroscopy, we show that a high concentration of CO and OH on the catalyst surface promotes C-C coupling, a finding that we correlate with evidence of increased CO residence time. The optimized electrodeposited Cu catalyst achieves a 60% faradaic efficiency for ethylene and 90% for multicarbon products. When deployed in a slim flow cell, the catalyst attains a 20% energy efficiency to ethylene, and 30% to multicarbon products.

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http://hdl.handle.net/10453/176079