Nitrogen‐Bridged S−N−Cu Sites for CO 2 Photoreduction to Ethanol with 99.5 % Selectivity in Pure Water

Abstract Solar‐driven CO 2 reduction to ethanol is extremely challenging due to the limited efficiency of charge separation, sluggish kinetics of C−C coupling, and unfavorable formation of oxygenate intermediates. Here, we elaborately design a red polymer carbon nitride (RPCN) consisting of S−N and Cu−N 4 dual active sites (Cu/S‐RPCN) to address this challenge, which achieves an impressive ethanol evolution rate of 50.4 μmol g −1 h −1 with 99.5 % selectivity for CO 2 photoreduction in pure water. Cu and S atoms within the Cu−N−S configuration can serve as trapping centers for electrons and holes, respectively, providing spatial separation for photogenerated charge carriers. The incorporation of S atoms…

• NN
  National Natural Science Foundation of China

  Awards: 22225808, 22478166, 52261135635, 22178149
• JU
  Jiangsu University

  Award: 202096
• CP
  China Postdoctoral Science Foundation

  Award: 2023M731421
• GO
  Government of Jiangsu Province
• NS
  Natural Science Foundation of Jiangsu Province

  Award: BK20211599