Cited by 645CO2 Reduction Techniques and CatalystsElectrocatalysts for Energy ConversionCatalysts for Methane Reforming

Probing the Active Surface Sites for CO Reduction on Oxide-Derived Copper Electrocatalysts

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Verdaguer-Casadevall, Arnau, Li, Christina W., Johansson, Tobias P., Scott, Soren B., McKeown, Joseph T., Kumar, Mukul, Stephens, Ifan E. L., Kanan, Matthew W. +1 more·2015·Journal of the American Chemical Society

Abstract

CO electroreduction activity on oxide-derived Cu (OD-Cu) was found to correlate with metastable surface features that bind CO strongly. OD-Cu electrodes prepared by H2 reduction of Cu2O precursors reduce CO to acetate and ethanol with nearly 50% Faradaic efficiency at moderate overpotential. Temperature-programmed desorption of CO on OD-Cu revealed the presence of surface sites with strong CO binding that are distinct from the terraces and stepped sites found on polycrystalline Cu foil. After annealing at 350 °C, the surface-area corrected current density for CO reduction is 44-fold lower and the Faradaic efficiency is less than 5%. These changes are accompanied by a reduction in the proportion of strong CO binding sites. We propose that the active sites for CO reduction on OD-Cu surfaces are strong CO binding sites that are supported by grain boundaries. Uncovering these sites is a first step toward understanding the surface chemistry necessary for efficient CO electroreduction.

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Authors
Verdaguer-Casadevall, A., Li, C. W., Johansson, T. P., Scott, S. B., McKeown, J. T., Kumar, M., Stephens, I. E. L., Kanan, M. W., & Chorkendorff, I.
Affiliations
  • Center for Individual Nanoparticle Functionality, Department of Physics, Technical University of Denmark (DTU), Kongens Lyngby, Denmark
  • Stanford University (US)
  • Technical University of Denmark (DK)
  • Lawrence Livermore National Laboratory (US)
Corresponding author
  • Kanan, Matthew W.
  • Chorkendorff, Ib
Venue
Journal of the American Chemical Society
Published
2015-07-30
Volume
137
Issue
31
Pages
9808-9811
ISSN
  • 0002-7863 (ISSN-L)
  • 1520-5126
OpenAlex
W2338294784
Cited by
645
References
26
Citations by year
2026: 34 · 2025: 42 · 2024: 55 · 2023: 72 · 2022: 74 · 2021: 71 · 2020: 80 · 2019: 75 · 2018: 59 · 2017: 40 · 2016: 38 · 2015: 5
FWCI
14.02
Type
journal article
Language
en
Open access
Locations
  • Journal of the American Chemical Society (publishedVersion)
  • PubMed (publishedVersion)
  • OSTI OAI (U.S. Department of Energy Office of Scientific and Technical Information) (submittedVersion)
  • Technical University of Denmark, DTU Orbit (Technical University of Denmark, DTU) (submittedVersion)
Funders
  • U.S. Department of Defense (FA9550-14-1-0132)
  • U.S. Department of Energy (FWP #SCW0939, DE-AC52-07NA27344)
Topics
  • Physical Sciences › Energy › Renewable Energy, Sustainability and the Environment › CO2 Reduction Techniques and Catalysts
  • Physical Sciences › Energy › Renewable Energy, Sustainability and the Environment › Electrocatalysts for Energy Conversion
  • Physical Sciences › Chemical Engineering › Catalysis › Catalysts for Methane Reforming
Keywords
CO electroreduction, oxide-derived copper, surface active sites, acetate production, ethanol production, temperature-programmed desorption, grain boundaries, annealing effects, Faradaic efficiency, electrocatalysis

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