Journal
CATALYSIS TODAY
Volume 265, Issue -, Pages 52-55Publisher
ELSEVIER SCIENCE BV
DOI: 10.1016/j.cattod.2015.10.037
Keywords
Heptazine; Covalent organic framework; Immobilization; Heterogenization; Hydrogenation; CO2; Formate
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Heterogenized Ir(III) catalysts were synthesized through the formation of coordination bonds between Ir( III) ions and heptazine-based covalent organic frameworks (COFs). The coordination environment of the Ir(III) ion contained the two heptazinyl nitrogen atoms as well as Cp* and Cl- anions. The heterogeneous catalyst exhibits high CO2 hydrogenation activity (turnover number (TON) = 6400 and turnover frequency (TOF) = 1500 h(-1)). In addition, the sub-micron sized catalyst was easily separated by filtration and the catalytic efficiency of the isolated catalyst was demonstrated over repeated cycles. (C) 2015 Elsevier B.V. All rights reserved.
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