dc.contributor.author
Yang, Fan
dc.contributor.author
Jiang, Shan
dc.contributor.author
Liu, Si
dc.contributor.author
Beyer, Paul
dc.contributor.author
Mebs, Stefan
dc.contributor.author
Haumann, Michael
dc.contributor.author
Roth, Christina
dc.contributor.author
Dau, Holger
dc.date.accessioned
2024-04-09T07:00:09Z
dc.date.available
2024-04-09T07:00:09Z
dc.identifier.uri
https://refubium.fu-berlin.de/handle/fub188/43082
dc.identifier.uri
http://dx.doi.org/10.17169/refubium-42798
dc.description.abstract
Oxide-derived copper (OD-Cu) materials exhibit extraordinary catalytic activities in the electrochemical carbon dioxide reduction reaction (CO2RR), which likely relates to non-metallic material constituents formed in transitions between the oxidized and the reduced material. In time-resolved operando experiment, we track the structural dynamics of copper oxide reduction and its re-formation separately in the bulk of the catalyst material and at its surface using X-ray absorption spectroscopy and surface-enhanced Raman spectroscopy. Surface-species transformations progress within seconds whereas the subsurface (bulk) processes unfold within minutes. Evidence is presented that electroreduction of OD-Cu foams results in kinetic trapping of subsurface (bulk) oxide species, especially for cycling between strongly oxidizing and reducing potentials. Specific reduction-oxidation protocols may optimize formation of bulk-oxide species and thereby catalytic properties. Together with the Raman-detected surface-adsorbed *OH and C-containing species, the oxide species could collectively facilitate *CO adsorption, resulting an enhanced selectivity towards valuable C2+ products during CO2RR.
en
dc.format.extent
13 Seiten
dc.rights.uri
https://creativecommons.org/licenses/by/4.0/
dc.subject
Electrocatalysis
en
dc.subject
copper foams
en
dc.subject
electrochemical CO2 reduction
en
dc.subject.ddc
500 Naturwissenschaften und Mathematik::540 Chemie::541 Physikalische Chemie
dc.title
Dynamics of bulk and surface oxide evolution in copper foams for electrochemical CO2 reduction
dc.type
Wissenschaftlicher Artikel
dcterms.bibliographicCitation.articlenumber
66
dcterms.bibliographicCitation.doi
10.1038/s42004-024-01151-0
dcterms.bibliographicCitation.journaltitle
Communications Chemistry
dcterms.bibliographicCitation.volume
7
dcterms.bibliographicCitation.url
https://doi.org/10.1038/s42004-024-01151-0
refubium.affiliation
Physik
refubium.funding
Springer Nature DEAL
refubium.note.author
Die Publikation wurde aus Open Access Publikationsgeldern der Freien Universität Berlin gefördert.
refubium.resourceType.isindependentpub
no
dcterms.accessRights.openaire
open access
dcterms.isPartOf.eissn
2399-3669