Highly Efficient and Selective Photocatalytic CO2 Reduction by Iron and Cobalt Quaterpyridine Complexes

Research output: Journal Publications and Reviews (RGC: 21, 22, 62)21_Publication in refereed journalpeer-review

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Author(s)

  • Claudio Cometto
  • Elodie Anxolabéhère-Mallart
  • Siu-Mui Ng
  • Guijian Liu
  • Lingjing Chen
  • Marc Robert

Related Research Unit(s)

Detail(s)

Original languageEnglish
Pages (from-to)9413-9416
Journal / PublicationJournal of the American Chemical Society
Volume138
Issue number30
Publication statusPublished - 3 Aug 2016

Abstract

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)3 2+ 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)3 2+ 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.

Citation Format(s)

Highly Efficient and Selective Photocatalytic CO2 Reduction by Iron and Cobalt Quaterpyridine Complexes. / Guo, Zhenguo; Cheng, Siwei; Cometto, Claudio; Anxolabéhère-Mallart, Elodie; Ng, Siu-Mui; Ko, Chi-Chiu; Liu, Guijian; Chen, Lingjing; Robert, Marc; Lau, Tai-Chu.

In: Journal of the American Chemical Society, Vol. 138, No. 30, 03.08.2016, p. 9413-9416.

Research output: Journal Publications and Reviews (RGC: 21, 22, 62)21_Publication in refereed journalpeer-review