Photoreduction of CO2 to methanol with hexanuclear molybdenum [Mo6Br14]2− cluster units under visible light irradiation

Pawan Kumar; Subodh Kumar; Stéphane Cordier; Serge Paofai; Rabah Boukherroub; Suman L. Jain

doi:10.1039/C3RA47255H

Photoreduction of CO₂ to methanol with hexanuclear molybdenum [Mo₆Br₁₄]²⁻ cluster units under visible light irradiation†

Pawan Kumar,^a Subodh Kumar,^a Stéphane Cordier,^b Serge Paofai,^b Rabah Boukherroub*^c and Suman L. Jain*^a

* Corresponding authors

^a Chemical Sciences Division, CSIR-Indian Institute of Petroleum, Dehradun-248005, India
E-mail: suman@iip.res.in
Fax: +91-135-2660202
Tel: +91-135-2525788

^b Université de Rennes 1, Institut Sciences Chimiques de Rennes, UR1-CNRS 6226, Equipe Chimie du Solide et Matériaux, Campus de Beaulieu, 35042 Rennes Cedex, France

^c Institut de Recherche Interdisciplinaire (IRI, USR CNRS 3078), Université Lille 1, Parc de la Haute Borne, 50 Avenue de Halley, 59658 Villeneuve d'Ascq, France

Abstract

Octahedral molybdenum clusters were found to be efficient visible light homogeneous photocatalysts for the reduction of carbon dioxide (CO₂) to methanol. Photoreduction was carried out by using 20 watt white cold LED flood light in dimethyl formamide/water or acetonitrile/water solutions containing triethylamine as a reductive quencher. Among the two cluster-based compounds, Cs₂[Mo₆Br₁₄] exhibited higher photocatalytic efficiency and afforded higher yield of methanol than (TBA)₂[Mo₆Br₁₄] (TBA = tetrabutylammonium). After 24 h illumination, the yield of methanol was 6679.45 and 5550.53 μmol g⁻¹ cat. using Cs₂[Mo₆Br₁₄] and (TBA)₂[Mo₆Br₁₄] cluster compounds as photocatalysts, respectively.

This article is part of the themed collection: Luminescence and photophysical properties of metal complexes

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Article information

DOI: https://doi.org/10.1039/C3RA47255H
Article type: Communication
Submitted: 03 Dec 2013
Accepted: 03 Feb 2014
First published: 03 Feb 2014

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RSC Adv., 2014,4, 10420-10423

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Photoreduction of CO₂ to methanol with hexanuclear molybdenum [Mo₆Br₁₄]²⁻ cluster units under visible light irradiation

P. Kumar, S. Kumar, S. Cordier, S. Paofai, R. Boukherroub and S. L. Jain, RSC Adv., 2014, 4, 10420 DOI: 10.1039/C3RA47255H

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