Fig. 6: Time-dependent CO2RR performance of the Cu-based catalysts at 3.5 V in the MEA cell.

Faradaic efficiencies of H2, C1, and C2+ of the (a) Cu2O cube, b Cu2O aggregate, and (c) cCu. The gas products were analyzed every 30 min, and the liquid products were collected for 15 min in pure electrolyte after GC injection. These data were obtained from single experiments for each catalyst.