Molecular Rh(III) and Ir(III) Catalysts Immobilized on Bipyridine-Based Covalent Triazine Frameworks for the Hydrogenation of CO2 to Formateopen access
- Authors
- Gunasekar, Gunniya Hariyanandam; Park, Kwangho; Jeong, Hyeonseok; Jung, Kwang-Deog; Park, Kiyoung; Yoon, Sungho
- Issue Date
- Jul-2018
- Publisher
- MDPI
- Keywords
- heterogenization on covalent triazine frameworks; immobilized bipyridine complexes; heterogenized Ir and Rh complexes; heterogeneous CO2 hydrogenation catalyst; leaching pathway of heterogenized half-sandwich complexes
- Citation
- CATALYSTS, v.8, no.7
- Journal Title
- CATALYSTS
- Volume
- 8
- Number
- 7
- URI
- https://scholarworks.bwise.kr/cau/handle/2019.sw.cau/45228
- DOI
- 10.3390/catal8070295
- ISSN
- 2073-4344
- Abstract
- The catalytic reactivity of molecular Rh(III)/Ir(III) catalysts immobilized on two- and three-dimensional Bipyridine-based Covalent Triazine Frameworks (bpy-CTF) for the hydrogenation of CO2 to formate has been described. The heterogenized Ir complex demonstrated superior catalytic efficiency over its Rh counterpart. The Ir catalyst immobilized on two-dimensional bpy-CTF showed an improved turnover frequency and turnover number compared to its three-dimensional counterpart. The two-dimensional Ir catalyst produced a maximum formate concentration of 1.8 M and maintained its catalytic efficiency over five consecutive runs with an average of 92% in each cycle. The reduced activity after recycling was studied by density functional theory calculations, and a plausible leaching pathway along with a rational catalyst design guidance have been proposed.
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