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

Saemi Im, Heesun Park, Yeonseo Kim, Eunji Kwon, Somin Chae, Hyung Kyu Lim, Sangheon Lee

Research output: Contribution to journalArticlepeer-review

1 Scopus citations


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.

Original languageEnglish
Article number151532
JournalApplied Surface Science
StatePublished - 30 Jan 2022

Bibliographical note

Publisher Copyright:
© 2021 Elsevier B.V.


  • Carbon dioxide reduction
  • Catalyst
  • Copper oxide
  • Density-functional theory
  • Overpotential


Dive into the research topics of 'Oxygen promoter on copper-silver coupling for electrochemical carbon dioxide reduction catalysts'. Together they form a unique fingerprint.

Cite this