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Oxygen promoter on copper-silver coupling for electrochemical carbon dioxide reduction catalysts

Title
Oxygen promoter on copper-silver coupling for electrochemical carbon dioxide reduction catalysts
Authors
Im S.Park H.Kim Y.Kwon E.Chae S.Lim H.-K.Lee S.
Ewha Authors
이상헌
SCOPUS Author ID
이상헌scopus
Issue Date
2022
Journal Title
Applied Surface Science
ISSN
0169-4332JCR Link
Citation
Applied Surface Science vol. 573
Keywords
Carbon dioxide reductionCatalystCopper oxideDensity-functional theoryOverpotential
Publisher
Elsevier B.V.
Indexed
SCIE; SCOPUS scopus
Document Type
Article
Abstract
The CO2-to-CO conversion catalyst is a key component in the design of an eco-friendly and energy-efficient process for the conversion of CO2 into useful chemicals. Ag and Cu are representative electrochemical catalytic materials for CO2 reduction, and coupling the two metals is an extensively used approach to increase the catalytic activity and selectivity. Through a series of first-principles calculations, we identify novel structure–activity correlations resulting from the various interfaces between the Ag surface and Cu oxide subsurface. We find that the oxygen atoms incorporated into Cu play a pivotal role in promoting Cu-Ag alloy catalysts. Our calculation results highlight that the sigma-type interaction between subsurface oxygen and surface Ag aligned perpendicular to the surface breaks the linear scaling relationship between key reaction intermediates and leads to subsequent activity enhancement for CO production. Given that Cu is susceptible to oxidation, the unraveled oxygen-induced activity promotion effect is anticipated to be taken as a practically applicable reference to ongoing efforts for the development of high-performance electrochemical CO2-to-CO conversion catalysts. © 2021 Elsevier B.V.
DOI
10.1016/j.apsusc.2021.151532
Appears in Collections:
엘텍공과대학 > 화학신소재공학전공 > Journal papers
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