Chem by Cell Press (@cp-chem.bsky.social)

Light-induced diluted CO2 capture and photoreduction We synthesized a series of stable metal-organic frameworks (MOFs) composed by [FeIII2MII(μ3-O)] (abbreviated as Fe2MO) clusters, denoted as USTC-12-Fe2M (M = Mn, Co, Ni), for photocatalytic CO2 reduction in a 15% CO2 atmosphere. Remarkably, USTC-12-Fe2Mn exhibits an ultrahigh CO2-to-CO conversion rate, reaching ∼16.1 mmolCO·gcatalyst−1·h−1 with 95% CO selectivity and an apparent quantum efficiency of 2.66% under visible-light irradiation. Experimental results reveal that Fe is the real active site driving photocatalytic CO2 reduction, with the divalent metal in the cluster modulating the Fe electronic state. In situ experiments demonstrate that CO2 molecules can be readily captured by the μ3-O atom and pre-activated on Fe2MO clusters to form ∗c-CO32− intermediates under light irradiation, enabling CO2 photoreduction at low CO2 concentrations. http://dlvr.it/TT476p