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Issue 9, 2012
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Catalyzed activation of CO2 by a Lewis-base site in W–Cu–BTC hybrid metal organic frameworks

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Abstract

A metal–organic framework (MOF)-based catalyst W–Cu–BTC is designed by hybridizing highly active W ions into Cu3(BTC)2(H2O)3 (also known as Cu–BTC or HKUST-1, BTC = 1,3,5-tricarboxylate benzene) frameworks based on density functional (DFT) calculations. We show that the hybrid W–Cu node plays a pivotal role in activating CO2 according to frontier molecular orbital theory. In contrast to the Lewis-acid nature of open metal sites in most MOFs, the exposed W ion in W–Cu–BTC is identified as a Lewis-base site, evidenced by the substantial electron donation from W ion to CO2. Kinetically, the linear CO2 molecule can be readily bent by forming a CO2–W complex after overcoming a negligible activation barrier of 0.09 eV. In addition, we present calculated infrared spectra (IR) and X-Ray spectra (XPS) for reference in future experimental studies.

Graphical abstract: Catalyzed activation of CO2 by a Lewis-base site in W–Cu–BTC hybrid metal organic frameworks

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Publication details

The article was received on 25 Apr 2012, accepted on 26 Jun 2012 and first published on 27 Jun 2012


Article type: Edge Article
DOI: 10.1039/C2SC20521A
Citation: Chem. Sci., 2012,3, 2708-2715
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    Catalyzed activation of CO2 by a Lewis-base site in W–Cu–BTC hybrid metal organic frameworks

    Q. Zhang, L. Cao, B. Li and L. Chen, Chem. Sci., 2012, 3, 2708
    DOI: 10.1039/C2SC20521A

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