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Hydrogenation of Carbon Dioxide to C 2 –C 4 Hydrocarbons Catalyzed by Pd(P t Bu 3 ) 2 –FeCl 2 with Ionic Liquid as Cocatalyst
Author(s) -
Wang Huan,
Zhao Yanfei,
Wu Yunyan,
Li Ruipeng,
Zhang Hongye,
Yu Bo,
Zhang Fengtao,
Xiang Junfeng,
Wang Zhenpeng,
Liu Zhimin
Publication year - 2019
Publication title -
chemsuschem
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 2.412
H-Index - 157
eISSN - 1864-564X
pISSN - 1864-5631
DOI - 10.1002/cssc.201901820
Subject(s) - ionic liquid , hexafluorophosphate , catalysis , chemistry , homogeneous catalysis , homogeneous , xantphos , medicinal chemistry , ligand (biochemistry) , tetrafluoroborate , inorganic chemistry , organic chemistry , palladium , biochemistry , physics , receptor , thermodynamics
Direct hydrogenation of CO 2 to C 2+ hydrocarbons is very interesting, but achieving this transformation below 200 °C is challenging and seldom reported. Herein, a homogeneous catalytic system was developed composed of the ionic liquid 1‐butyl‐3‐methylimidazolium hexafluorophosphate ([BMIm][PF 6 ]), Pd(P t Bu 3 ) 2 , FeCl 2 , and the ligand 4,5‐bis(diphenylphosphino)‐9,9‐dimethylxanthene (Xantphos) for hydrogenation of CO 2 under mild conditions, which resulted in C 2 –C 4 hydrocarbons in selectivities up to 98.3 C‐mol % at 180 °C. The combination of [BMIm][PF 6 ]) with Xantphos endowed the Pd–Fe catalysts with the ability of activating CO 2 and H 2 simultaneously via [HPd(P t Bu 3 )(BMIm‐COO)(BMIm)(PF 6 )Fe] + species, thus catalyzing the formation of C 2 –C 4 hydrocarbons through CO 2 hydrogenation. In addition, this catalytic system is stable and recyclable, which may have promising applications.