Extended Data Fig. 9. Galvanostatically controlled CO₂R on Au with and without CA (20 µM) in 0.1 M KHCO₃ solution.

Galvanostatically controlled CO₂R on Au with and without CA (20 µM) in 0.1 M KHCO₃ solution (a) Experimental (points) and simulated (lines) total (purple) and partial current densities for H₂ (orange) and CO (blue) from constant current electrolysis of Au. (b) Experimental H₂ (orange), CO (blue) and total (purple) FE. Points represent averages of at least three independent stepped-chronopotentiometry experiments, where filled points were with CA immobilised on the electrode surface and unfilled without. Y Error bars represent the standard deviation of measured currents. All experiments conducted at 20°C