Efficient electrocatalytic CO2 reduction with a molecular cofacial iron porphyrin dimer

Abstract

A cofacial iron tetraphenyl porphyrin dimer, o-Fe₂DTPP, bio-inspired by the Ni–Fe containing metalloenzyme, carbon monoxide dehydrogenase (CODH), efficiently and selectively catalyses the electrochemical reduction of CO₂ to CO in DMF/10% H₂O solution at the electro-generated Fe⁰(por) species with high Faradic efficiency (95%) and TOF (4300 s⁻¹) at a moderate overpotential, η = 0.66 V.