dc.contributor.author
Pardo Pérez, Laura C.
dc.contributor.author
Arndt, Alexander
dc.contributor.author
Stojkovikj, Sasho
dc.contributor.author
Ahmet, Ibbi Y.
dc.contributor.author
Arens, Joshua T.
dc.contributor.author
Dattila, Federico
dc.contributor.author
Wendt, Robert
dc.contributor.author
Buzanich, Ana Guilherme
dc.contributor.author
Radtke, Martin
dc.contributor.author
Davies, Veronica
dc.date.accessioned
2022-02-07T11:51:02Z
dc.date.available
2022-02-07T11:51:02Z
dc.identifier.uri
https://refubium.fu-berlin.de/handle/fub188/33466
dc.identifier.uri
http://dx.doi.org/10.17169/refubium-33187
dc.description.abstract
The development of earth-abundant catalysts for selective electrochemical CO2 conversion is a central challenge. Cu-Sn bimetallic catalysts can yield selective CO2 reduction toward either CO or formate. This study presents oxide-derived Cu-Sn catalysts tunable for either product and seeks to understand the synergetic effects between Cu and Sn causing these selectivity trends. The materials undergo significant transformations under CO2 reduction conditions, and their dynamic bulk and surface structures are revealed by correlating observations from multiple methods—X-ray absorption spectroscopy for in situ study, and quasi in situ X-ray photoelectron spectroscopy for surface sensitivity. For both types of catalysts, Cu transforms to metallic Cu0 under reaction conditions. However, the Sn speciation and content differ significantly between the catalyst types: the CO-selective catalysts exhibit a surface Sn content of 13 at. % predominantly present as oxidized Sn, while the formate-selective catalysts display an Sn content of ≈70 at. % consisting of both metallic Sn0 and Sn oxide species. Density functional theory simulations suggest that Snδ+ sites weaken CO adsorption, thereby enhancing CO selectivity, while Sn0 sites hinder H adsorption and promote formate production. This study reveals the complex dependence of catalyst structure, composition, and speciation with electrochemical bias in bimetallic Cu catalysts.
en
dc.format.extent
16 Seiten
dc.rights.uri
https://creativecommons.org/licenses/by/4.0/
dc.subject
CO2 conversion
en
dc.subject
electrocatalysis
en
dc.subject
non-noble catalysts
en
dc.subject
X-ray spectroscopy
en
dc.subject.ddc
500 Naturwissenschaften und Mathematik::540 Chemie::540 Chemie und zugeordnete Wissenschaften
dc.title
Determining Structure-Activity Relationships in Oxide Derived CuSn Catalysts During CO2 Electroreduction Using X-Ray Spectroscopy
dc.type
Wissenschaftlicher Artikel
dcterms.bibliographicCitation.articlenumber
2103328
dcterms.bibliographicCitation.doi
10.1002/aenm.202103328
dcterms.bibliographicCitation.journaltitle
Advanced Energy Materials
dcterms.bibliographicCitation.number
5
dcterms.bibliographicCitation.volume
12
dcterms.bibliographicCitation.url
https://doi.org/10.1002/aenm.202103328
refubium.affiliation
Biologie, Chemie, Pharmazie
refubium.affiliation.other
Institut für Chemie und Biochemie
refubium.funding
DEAL Wiley
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
1614-6840
refubium.resourceType.provider
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