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Laboratoire d'Electrochimie Moleculaire, LEM, Paris

UMR CNRS - Université Paris 7 - Paris France

   
 
USPC | Université Sorbonne Paris Cité Master Chimie Paris Cité dirigée vers les nanosciences et l'énergie - Université Paris Diderot - Paris 7 UFR de Chimie - Université Paris Diderot - Paris 7 CNRS - Institut de chimie
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Université Paris Diderot Paris 7
CNRS, Centre National de la Recherche Scientifique
 
 


Le LEM - Publications: Abstracts

Publication 802

J. Am. Chem. Soc., 138 (30), 9413-9416, 2016
DOI:10.1021/jacs.6b06002
   
doi

Highly efficient and selective photocatalytic CO2 reduction by iron and cobalt quaterpyridine complexes

 

Zhenguo Guo, Siwei Cheng, Claudio Cometto, Elodie Anxolabéhère-Mallart, Siu-Mui Ng, Chi-Chiu Ko, Guijian Liu, Lingjing Chen, Marc Robert, and Tai-Chu Lau

Department of Biology and Chemistry, Institute of Molecular Functional Materials, and State Key Laboratory in Marine Pollution, City University of Hong Kong, Tat Chee Avenue, Kowloon Tong, Hong Kong, China
Université Paris Diderot, Sorbonne Paris Cité, Laboratoire d’Electrochimie Moléculaire, UMR 7591 CNRS, 15 rue Jean-Antoine de Baïf, F-75205 Paris Cedex 13, France
CAS Key Laboratory of Crust-Mantle and the Environment, School of Earth and Space Sciences, University of Science and Technology of China, Hefei, Anhui 230026, China

The design of highly efficient and selective photocatalytic systems for CO2 reduction that are based on nonexpensive materials is a great challenge for chemists. The photocatalytic reduction of CO2 by [Co(qpy)(OH2)2]2+ (1) (qpy = 2,2':6',2":6",2"'-quaterpyridine) and [Fe(qpy)(OH2)2]2+ (2) have been investigated. With Ru(bpy)32+ as the photosensitizer and 1,3-dimethyl-2-phenyl-2,3-dihydro-1H-benzo[d]imidazole as the sacrificial reductant in CH3CN/triethanolamine solution under visible-light excitation (blue light-emitting diode), a turnover number (TON) for CO as high as 2660 with 98% selectivity can be achieved for the cobalt catalyst. In the case of the iron catalyst, the TON was >3000 with up to 95% selectivity. More significantly, when Ru(bpy)32+ was replaced by the organic dye sensitizer purpurin, TONs of 790 and 1365 were achieved in N,N-dimethylformamide for the cobalt and iron catalysts, respectively.

 
   
 
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