Pure-water-fed, electrocatalytic CO2 reduction to ethylene beyond 1,000 h stability at 10 A

Abstract Electrocatalytic CO 2 reduction at near-ambient temperatures requires a complex inventory of protons, hydroxyls, carbonate ions and alkali-metal ions at the cathode and anode to be managed, necessitating the use of ion-selective membranes to regulate pH. Anion-exchange membranes provide an alkaline environment, allowing CO 2 reduction at low cell voltages and suppression of hydrogen evolution while maintaining high conversion efficiencies. However, the local alkaline conditions and the presence of alkali cations lead to problematic carbonate formation and even precipitation. Here we report a pure-water-fed (alkali-cation-free) membrane–electrode–assembly system for CO 2 reduction to ethylene by…

• NN
  National Natural Science Foundation of China

  Awards: 22108109, 22178152
• RG
  Research Grants Council, University Grants Committee

  Award: C5029-18E
• HK
  Hong Kong Polytechnic University

  Award: 1-CD7U, 1-YXA0 and Q-CDAK