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Title: Enhanced Carbon Dioxide Electroreduction to Carbon Monoxide over Defect-Rich Plasma-Activated Silver Catalysts

Efficient, stable catalysts with high selectivity for a single product are essential if electroreduction of CO 2 is to become a viable route to the synthesis of industrial feedstocks and fuels. A plasma oxidation pre-treatment of silver foil enhances the number of low-coordinated catalytically active sites, which dramatically lowers the overpotential and increases the activity of CO 2 electroreduction to CO. At -0.6 V versus RHE more than 90 % Faradaic efficiency towards CO was achieved on a pre-oxidized silver foil. While transmission electron microscopy (TEM) and operando X-ray absorption spectroscopy showed that oxygen species can survive in the bulk of the catalyst during the reaction, quasi in situ X-ray photoelectron spectroscopy showed that the surface is metallic under reaction conditions. Finally, DFT calculations reveal that the defect-rich surface of the plasma-oxidized silver foils in the presence of local electric fields drastically decrease the overpotential of CO 2 electroreduction.
ORCiD logo [1] ;  [2] ;  [3] ;  [2] ;  [4] ;  [2] ;  [2] ;  [2] ;  [2] ;  [5] ;  [5] ;  [4] ;  [3] ; ORCiD logo [6]
  1. Ruhr Univ., Bochum (Germany). Dept. of Physics; Univ. of Central Florida, Orlando, FL (United States). Dept. of Physics
  2. Ruhr Univ., Bochum (Germany). Dept. of Physics
  3. Univ. of Copenhagen (Denmark). Dept. of Chemistry
  4. Univ. of Pittsburgh, PA (United States). Chemical and Petroleum Engineering and Physics
  5. Brookhaven National Lab. (BNL), Upton, NY (United States). Center for Functional Nanomaterials
  6. Ruhr Univ., Bochum (Germany). Dept. of Physics; Fritz-Haber Inst. of the Max Planck Society, Berlin (Germany). Dept. of Interface Science
Publication Date:
Report Number(s):
Journal ID: ISSN 0044-8249
Grant/Contract Number:
SC0012704; AC02-06CH11357; FG02-03ER15476; CHEM 1213182; CHE-1534630; 03SF0523C; ERC-725915; CF15-0165
Accepted Manuscript
Journal Name:
Angewandte Chemie
Additional Journal Information:
Journal Volume: 129; Journal Issue: 38; Journal ID: ISSN 0044-8249
German Chemical Society
Research Org:
Brookhaven National Lab. (BNL), Upton, NY (United States); Univ. of Pittsburgh, PA (United States); Ruhr Univ., Bochum (Germany); Univ. of Copenhagen (Denmark)
Sponsoring Org:
USDOE Office of Science (SC), Basic Energy Sciences (BES) (SC-22); National Science Foundation (NSF); German Federal Ministry of Education and Research (BMBF); German Research Foundation (DFG); European Research Council (ERC); Carlsberg Foundation (Denmark)
Country of Publication:
United States
OSTI Identifier:
Alternate Identifier(s):
OSTI ID: 1374676