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An effective heterogeneous Ir(III) catalyst, immobilized on a heptazine-based organic framework, for the hydrogenation of CO2 to formate
- Authors
- Hariyanandam, Gunasekar Gunniya; Hyun, Daehee; Natarajan, Prakash; Jung, Kwang-Deog; Yoon, Sungho
- Issue Date
- May-2016
- Publisher
- ELSEVIER SCIENCE BV
- Keywords
- Heptazine; Covalent organic framework; Immobilization; Heterogenization; Hydrogenation; CO2; Formate
- Citation
- CATALYSIS TODAY, v.265, pp 52 - 55
- Pages
- 4
- Journal Title
- CATALYSIS TODAY
- Volume
- 265
- Start Page
- 52
- End Page
- 55
- ISSN
- 0920-5861
1873-4308
- Abstract
- 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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