fig8
Figure 8. Catalytic CO2 reduction mechanism of Fe-porphyrin complexes, involving formation of an Fe-CO2•- adduct, stepwise reduction from Fe(II) to Fe(0)[157]. The rate-determining step is a concerted proton-coupled electron transfer with C-O bond cleavage, ultimately leading to CO release from an inhibited Fe-CO intermediate. Reprinted with permission from Ref.[157]. Copyright © 2013, American Chemical Society.
