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Ceo

Zi Yang1, Deguang Ji1, Zhi Li1

  • 1Stat Key Laboratory of Applied Organic Chemistry, Frontiers Science Center for Rare Isotopes, College of Chemistry and Chemical Engineering, Lanzhou University, Lanzhou, 730000, China.

Small (Weinheim an Der Bergstrasse, Germany)
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Summary

Cerium stabilizes copper active sites for efficient electrochemical CO2 reduction to ethanol. This strategy enhances ethanol selectivity and promotes carbon-carbon coupling for CO2 conversion.

Keywords:
CO2/electroreductionCeO2/CuSCu+ sitesethanolselectivity

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Area of Science:

  • Electrochemistry
  • Materials Science
  • Catalysis

Background:

  • Copper-based electrocatalysts are effective for CO2 reduction to multicarbon products.
  • Instability of active sites remains a major challenge in CO2 electroreduction.

Purpose of the Study:

  • To stabilize copper active sites for improved CO2 electroreduction.
  • To enhance selectivity towards ethanol production.
  • To investigate the mechanism of CO2 to ethanol conversion.

Main Methods:

  • Utilized cerium as a self-sacrificing agent to stabilize Cu+ in CuS.
  • Synthesized CeO2-modified CuS nanoplates.
  • Employed in situ Raman and FTIR spectroscopy.
  • Performed density functional theory calculations.

Main Results:

  • CeO2-modified CuS nanoplates achieved high ethanol selectivity (FE up to 54%).
  • Achieved a C2+ product selectivity (FEC2+) of approximately 75%.
  • Demonstrated that stable Cu+ species promote C-C coupling for ethanol generation.

Conclusions:

  • Cerium effectively stabilizes Cu+ active sites, improving CO2 electroreduction performance.
  • The strategy facilitates selective CO2 conversion to ethanol.
  • This work offers a facile method for CO2 valorization into valuable chemicals.