Dynamic Cu 0 /Cu + Interface Promotes Acidic CO 2 Electroreduction

Acidic CO2 electroreduction reaction (CO2RR) shows advantages in high carbon utilization efficiency yet encounters great challenges in suppressing undesired hydrogen evolution competition and increasing C2+ product selectivity. Although it is known that Cu0/Cu+ interfaces are conducive to C–C coupling processes, the oxidation state of copper cannot be well maintained under the strong reductive condition and large current electrolysis operation. Herein, we propose an I2 addition involved strategy to protect the oxidation state of Cu and promote dynamic Cu0/Cu+ interfaces during acidic CO2RR. With the addition of I2 in the electrolyte, a high C2+ product Faraday efficiency of above 70% can be achieved at 0.4–0.6…

• CS
  China Scholarship Council
• AR
  Australian Research Council

  Awards: FT200100062, CE230100032, DP230102027, LP210301397, DE240100661