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Modular Polyoxometalate–Layered Double Hydroxides as Efficient Heterogeneous Sulfoxidation and Epoxidation Catalysts
Author(s) -
Li Tengfei,
Zhang Wei,
Chen Wei,
Miras Haralampos N.,
Song YuFei
Publication year - 2018
Publication title -
chemcatchem
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.497
H-Index - 106
eISSN - 1867-3899
pISSN - 1867-3880
DOI - 10.1002/cctc.201701056
Subject(s) - catalysis , magic angle spinning , thermogravimetric analysis , polyoxometalate , x ray photoelectron spectroscopy , heterogeneous catalysis , layered double hydroxides , chemistry , nuclear magnetic resonance spectroscopy , spectroscopy , materials science , chemical engineering , selectivity , inorganic chemistry , organic chemistry , physics , quantum mechanics , engineering
The selective sulfoxidation of sulfides and the epoxidation of olefins are two types of important organic reactions, and the corresponding products of sulfoxides, sulfones and epoxides are used widely as raw materials in industrial processes. The fabrication of one efficient catalyst for both reactions remains a challenging task. We report the preparation of a highly efficient heterogeneous catalyst Mg 3 Al‐ILs‐La(PW 11 ) 2 using an exfoliation/assembly approach. The catalyst was characterised by FT‐IR spectroscopy, XRD, thermogravimetric and differential thermal analysis, BET measurements, X‐ray photoelectron spectroscopy, 29 Si cross‐polarisation magic‐angle spinning NMR spectroscopy, 27 Al magic‐angle spinning NMR spectroscopy, SEM, high‐resolution TEM, and energy‐dispersive X‐ray spectroscopy. The designed catalyst showed a high efficiency and selectivity for the sulfoxidation of sulfides and the epoxidation of olefins under mild conditions at a production rate of 208 and 31 mmol g −1 h −1 , respectively. Moreover, Mg 3 Al‐ILs‐La(PW 11 ) 2 can be recycled and re‐used at least five times without a clear decrease of its catalytic activity. The scaled‐up experiments revealed that the catalyst retained its efficiency and robustness, which demonstrates the great potential of the catalyst for industrial applications.