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Issue 8, 2018
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TiO2 modified with a Ru(II)–N′NN′ 8-hydroxyquinolyl complex for efficient gaseous photoreduction of CO2

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Abstract

A new rigid neutral Ru(II) pincer complex [Ru(N′NN′)(ONO)] was synthesized from cationic [Ru(N′NN′)(MeCN)2Cl]Cl (N′NN′, 2,6-bis(N-benzyl-benzimidazol-2-yl)pyridine) and 4,8-dihydroxyquiniline-2-carboxylic acid (ONO). The X-ray diffraction analysis indicates that the Ru(II) center adopts a slightly distorted octahedral geometry, in which the two benzyl moieties of the N′NN′ ligand are located on the same side of the coordination plane, defined by three N atoms of N′NN′ and the Ru(II) center, and the dihedral angles of the benzyl group and the Ru(II)–N′NN′ plane are 89.1° and 74.9°, respectively. Upon loading onto TiO2 nanoparticles (P25), this Ru(II) complex exhibits an efficient CO2 photoreduction ability with CO/CH4 production activities of 26.6/17.2 μmol g−1 h−1 in a gaseous photocatalytic system containing CO2 and H2O vapor, which is much better than that of the pristine TiO2 nanoparticles. This result gives a good example of TiO2 nanoparticles loaded with the Ru(II) pincer complex acting as a heterogeneous photocatalytic CO2 reduction system, which could facilitate the development of a more feasible artificial photosynthesis system.

Graphical abstract: TiO2 modified with a Ru(ii)–N′NN′ 8-hydroxyquinolyl complex for efficient gaseous photoreduction of CO2

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Publication details

The article was received on 23 Jan 2018, accepted on 18 Mar 2018 and first published on 19 Mar 2018


Article type: Paper
DOI: 10.1039/C8CY00158H
Citation: Catal. Sci. Technol., 2018,8, 2098-2103
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    TiO2 modified with a Ru(II)–N′NN′ 8-hydroxyquinolyl complex for efficient gaseous photoreduction of CO2

    W. Xiang, L. Li, Z. Dai, X. Meng, R. Li, J. Zhang and T. Peng, Catal. Sci. Technol., 2018, 8, 2098
    DOI: 10.1039/C8CY00158H

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