Fig. 2: Interaction of amine on the electrode surface.

A The used amines in this study and B the visualization of inner-sphere (Cu) and outer-sphere (Pb) electron transfer mechanisms. C The schematic overview of the bicarbonate production (HCO₃⁻) in the presence of amines and CO₂. MEA monoethanolamine, AMP   2-amino-2-methyl-1-propanol.