Cascade electrocatalysis via AgCu single-atom alloy and Ag nanoparticles in CO2 electroreduction toward multicarbon products

Abstract Electrocatalytic CO 2 reduction into value-added multicarbon products offers a means to close the anthropogenic carbon cycle using renewable electricity. However, the unsatisfactory catalytic selectivity for multicarbon products severely hinders the practical application of this technology. In this paper, we report a cascade AgCu single-atom and nanoparticle electrocatalyst, in which Ag nanoparticles produce CO and AgCu single-atom alloys promote C-C coupling kinetics. As a result, a Faradaic efficiency (FE) of 94 ± 4% toward multicarbon products is achieved with the as-prepared AgCu single-atom and nanoparticle catalyst under ~720 mA cm −2 working current density at −0.65 V in a flow cell with…

• UD
  U.S. Department of Energy
• CC
  Compute Canada
• CF
  Canada First Research Excellence Fund
• OO
  Office of Science
• NS
  Natural Sciences and Engineering Research Council of Canada

  Awards: RGPIN-2020, RGPIN-2020-05903, 05903, GECR-2020-00476