Selective Reduction of CO2 with Silanes over Platinum Nanoparticles Immobilised on a Polymeric Monolithic Support under Ambient Conditions

Authors

  • Dr. Vijay P. Taori,

    1. Institute für Polymerchemie, Universität Stuttgart, Pfaffenwaldring 55, 70550 Stuttgart (Germany), Fax: (+49) 711-685-64050
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  • Dr. Rajendar Bandari,

    1. Institute für Polymerchemie, Universität Stuttgart, Pfaffenwaldring 55, 70550 Stuttgart (Germany), Fax: (+49) 711-685-64050
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  • Prof. Michael R. Buchmeiser

    Corresponding author
    1. Institute für Polymerchemie, Universität Stuttgart, Pfaffenwaldring 55, 70550 Stuttgart (Germany), Fax: (+49) 711-685-64050
    • Institute für Polymerchemie, Universität Stuttgart, Pfaffenwaldring 55, 70550 Stuttgart (Germany), Fax: (+49) 711-685-64050

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Abstract

Here, we demonstrate the use of Pt0 nanoparticles immobilised on a polymeric monolithic support as a ligand-free heterogeneous catalytic system for the reduction of 13CO2 at room temperature and atmospheric pressure. The described system effectively reduces 13CO2 with dihydrosilanes as the hydrogen source to yield a mixture of silylformates, silylacetals and methoxysilanes, which upon further hydrolysis with D2O, produces their respective C1-type products, that is H13COOD, 13CH2(OD)2 and 13CH3OD. If a monohydrosilane was used as the hydrogen source, a selective reduction of 13CO2 to a product mixture of only silylformates was observed. Addition of diethylamine to this reaction mixture results in the formation of H13COOH and Et2N13CHO. This robust catalytic system is not only maintenance-free and simple to handle, as compared with organometallic and organocatalyst systems, but also shows 3- to 11-fold better catalytic activity and exhibits higher turnover numbers (TONs) up to 21 900 (activity=6.22 kgmath formula gPt−1 bar−1).

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