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Issue 18, 2012
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Low temperature activation and reactivity of CO2 over a CrII-based heterogeneous catalyst: a spectroscopic study

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Abstract

A new heterogeneous catalyst for CO2 activation was identified in the CrII/SiO2 Phillips catalyst, one of the most important catalysts used industrially for olefin polymerization. Interestingly, it was found that CrII/SiO2 strongly activates CO2 already at room temperature, making it available for chemicals synthesis. A preliminary attempt in this direction was done by following the reaction of CO2 with ethylene oxide at room temperature by means of FT-IR spectroscopy, which showed the formation of ethylene carbonate. Besides non-reductive CO2 activation, CrII/SiO2 showed good performances in catalytic reduction of CO2 to CO, when heated under mild conditions or irradiated with UV-Vis light. Both, in situ FT-IR and UV-Vis spectroscopy, were applied to highlight the redox process occurring at the Cr centres. These results open interesting perspectives to be developed in the field of CO2 chemical fixation.

Graphical abstract: Low temperature activation and reactivity of CO2 over a CrII-based heterogeneous catalyst: a spectroscopic study

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Publication details

The article was received on 20 Feb 2012, accepted on 13 Mar 2012 and first published on 13 Mar 2012


Article type: Paper
DOI: 10.1039/C2CP40524E
Citation: Phys. Chem. Chem. Phys., 2012,14, 6538-6543
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    Low temperature activation and reactivity of CO2 over a CrII-based heterogeneous catalyst: a spectroscopic study

    E. Groppo, A. Zecchina, C. Barzan and J. G. Vitillo, Phys. Chem. Chem. Phys., 2012, 14, 6538
    DOI: 10.1039/C2CP40524E

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