Visible-Light-Driven Photocatalytic CO₂ Reduction by a Ni(II) Complex Bearing a Bioinspired Tetradentate Ligand for Selective CO Production

Abstract

A Ni(II) complex bearing an SN-type tetradentate ligand inspired by the active site of carbon monoxide dehydrogenase was found to selectively catalyze CO reduction to produce CO in a photocatalytic system using [Ru(bpy)] (bpy = 2,2'-bipyridine) as a photosensitizer and 1,3-dimethyl-2-phenyl-2,3-dihydro-1H-benzo[d]imidazole (BIH) as an electron donor. The Ni(II) complex shows a high turnover number over 700 with high CO selectivity of >99% and quantum yield of 1.42% in the photocatalytic system.

Highly efficient photocatalytic reduction of CO2 and H2O to CO and H2 with a cobalt bipyridyl complex

“…After illumination for 4 h ( λ > 420 nm), the amounts of generated CO and H 2 were determined to be 62.3 and 69.9 μmol, respectively, by gas chromatography. On the basis of the catalyst loading, the turnover number (TON) for CO generation was calculated to be 6230, which is much higher than that reported for Co-based molecular catalysts for photocatalytic CO 2 reduction and indicating that our catalyst is one of the most efficient CO 2 reduction molecular catalyst [18,[31][32][33][34][35] (Table S1). The mixture gases with similar amount of CO and H 2 could be a candidate as syngas [24,25] .…”

Ordered colloidal clusters constructed by nanocrystals with valence for efficient CO 2 photoreduction

“…Converting CO 2 to value-added carbon products, particularly by a reduction reaction using solar energy, represents a promising solution for the increasing energy demand and global warming (46)(47)(48)(49)(50)(51)(52)(53). Reticular materials, for example, metal-organic frameworks (MOFs), have recently been emerging as ideal platforms for CO 2 photoreduction.…”

Second‐Sphere Biomimetic Multipoint Hydrogen‐Bonding Patterns to Boost CO2 Reduction of Iron Porphyrins

“…An emphasis is currently being put on the discovery of new cost-efficient molecular catalysts to drive the electrocatalysis of CO 2 reduction and ultimately to use solar energy to drive these energetically uphill chemical transformations. [1][2][3][4][5][6][7][8][9] Still, the route towards industrial upscale applications requires much improvement in the efficiency of these catalysts while maintaining their stability and selectivity.…”