Earth-abundant photocatalytic systems for the visible-light-driven reduction of CO2 to CO

Abstract

Herein, we report a highly selective photocatalytic system, based on an in situ copper photosensitizer and an iron catalyst, for the reduction of CO₂ to CO. Turnover numbers (TON) up to 487 (5 h) with selectivities up to 99% and Φ_CO = 13.3% were observed. Stern–Volmer analysis allowed us to establish a reductive quenching mechanism between the Cu PS and electron donor.