Highly Efficient and Selective Visible‐Light Driven CO2‐to‐CO Conversion by a Co(II) Homogeneous Catalyst in H2O/CH3CN Solution

Highly Efficient and Selective Visible‐Light Driven CO2‐to‐CO Conversion by a Co(II) Homogeneous Catalyst in H2O/CH3CN Solution

The photochemical reduction of CO2 to chemical resources has displayed the promise to solve energy and environmental problems. To facilitate this reaction, a considerable challenge is to design not only highly efficient and selective, but also economic catalysts. In this study, we report a homogeneo...

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Bibliographic Details
Published in:ChemCatChem 2018-08, Vol.10 (16), p.3435-3440
Main Authors: Liu, Dong‐Cheng, Huang, Hai‐Hua, Wang, Jia‐Wei, Jiang, Long, Zhong, Di‐Chang, Lu, Tong‐Bu
Format: Article
Language:eng
Subjects:
Carbon dioxide
Carbon monoxide
Catalysts
Catalytic converters
CO2 reduction
cobalt
Conversion
homogeneous catalyst
Organic chemistry
photocatalysis
Reduction
Selectivity
tripodal ligand
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Summary:The photochemical reduction of CO2 to chemical resources has displayed the promise to solve energy and environmental problems. To facilitate this reaction, a considerable challenge is to design not only highly efficient and selective, but also economic catalysts. In this study, we report a homogeneous catalyst, [CoL1(CH3CN)](ClO4)2 (1, L1=Tris[2‐(iso‐propylamino)ethyl]amine) which displays high activity and selectivity for CO2 reduction to CO driven by visible light in a water‐containing system, with turnover numbers (TONCO) and turnover frequencies (TOF), and CO selectivity values of 44800, 1.24 s−1 and 97 %, respectively. The excellent performances of 1 for the photocatalytic CO2‐to‐CO conversion is confirmed by control experiments and its catalytic mechanism is corroborated by DFT calculations. The mononuclear option: A mononuclear cobalt complex supported by a tripodal ligand, exhibits high activity and selectivity for the photocatalytic reduction of CO2 to CO in a water‐containing system. The TON and TOF values are higher than most reported molecular catalysts for photocatalytic CO2 reduction. Control experiments and DFT calculations results demonstrate that 1 is an excellent candidate for photocatalytic conversion of CO2 to CO.
ISSN:1867-3880
1867-3899