Visible‐Light‐Driven CO₂ Reduction Catalyzed by a Dinuclear Nickel Complex

Abstract

The utilization of synergy between two metal sites in dinuclear metal catalysts for CO2 reduction remains challenging. Herein, for the first time, we employ a dinuclear nickel complex as a molecular catalyst for visible‐light‐driven CO2 reduction with 99 % selectivity toward CO production. The photocatalytic mechanism was proposed based on the results of electrochemical measurements and fluorescent quenching experiments.

Co-facial π–π Interaction Expedites Sensitizer-to-Catalyst Electron Transfer for High-Performance CO2 Photoreduction

“…Ultimately, the catalytic mechanism for the optimal IrPPPY / Co-PYN5 system for photocatalytic CO 2 reduction can be tentatively proposed in Figure 9 , according to the abovementioned results and our previous findings on molecular catalysts. 3 , 20 , 70 , 71 Initially, the photoexcitation of IrPPPY generates its excited state. Afterward, the oxidative quenching takes place, in which the photo-induced electron is rapidly delivered to Co-PYN5 catalyst via the co-facial pyrenyl–pyrenyl π–π interaction, giving rise to the oxidized IrPPPY and the one-electron reduced Co-PYN5 .…”

Dinuclear metal synergistic catalysis for energy conversion

“…The enhanced catalytic efficiency of the dinuclear nickel complex can be attributed to the synergy between two Ni sites. 131…”

Homogeneous Systems Containing Earth‐Abundant Metal Complexes for Photoactivated CO2 Reduction: Recent Advances

“…In catalyst Ni8 , developed by Wang et al ., two Ni(II) centers are coordinated by 2,6‐bis((bis(pyridin‐2‐ylmethyl)amino)‐methyl)‐4‐(tert‐butyl)phenol ligand [68] . The Ni−Ni distance of 3.950 Å is advantageous for the cooperative activation of CO 2 .…”

“…In catalyst Ni8, developed by Wang et al, two Ni(II) centers are coordinated by 2,6-bis((bis(pyridin-2-ylmethyl)amino)-methyl)-4-(tert-butyl)phenol ligand. [68] The NiÀ Ni distance of 3.950 Å is advantageous for the cooperative activation of CO 2 . The photocatalytic experiments were conducted in MeCN/H 2 O (4 : 1) under irradiation at 450 nm.…”