title: Ionic liquid-Pluronic P123 mixed micelle stabilized water-soluble Ni nanoparticles for catalytic hydrogenation.
abstract: Ionic liquid (1-butyl-2,3-dimethylimidazolium acetate, [BMMIm]OAc)-Pluronic P123 mixed micelle stabilized water-soluble Ni nanoparticles were characterized by UV-vis, XRD, XPS and TEM and then employed for catalytic hydrogenation. It was demonstrated that the mixed-micelle stabilized Ni NPs showed excellent catalytic performance for the selective hydrogenation of CC and nitro compounds in the aqueous phase under very mild reaction conditions, and also the Ni NPs catalysts can be recycled at least for eight times without significant decrease in catalytic activity. The results of characterization revealed that the mixed micelle-stabilized Ni NPs catalysts were highly dispersed in aqueous phases even after five catalytic recycles. In addition, adding ionic liquid ([BMMIm]OAc) can affect the micelle structure of P123 solutions and thus afford an additional steric protection from aggregation of Ni NPs, resulting in enhancing stability and catalytic activity of Ni NPs.
authors.affiliation: Key Laboratory for Advanced Materials, Research Institute of Industrial Catalysis, East China University of Science and Technology, 200237 Shanghai, China.
authors.forename: Yinyin
authors.initials: Y
authors.lastname: Yu
authors.forename: Wenwen
authors.initials: W
authors.lastname: Zhu
authors.forename: Li
authors.initials: L
authors.lastname: Hua
authors.forename: Hanmin
authors.initials: H
authors.lastname: Yang
authors.forename: Yunxiang
authors.initials: Y
authors.lastname: Qiao
authors.forename: Ran
authors.initials: R
authors.lastname: Zhang
authors.forename: Li
authors.initials: L
authors.lastname: Guo
authors.forename: Xiuge
authors.initials: X
authors.lastname: Zhao
authors.forename: Zhenshan
authors.initials: Z
authors.lastname: Hou
mesh_terms: D000475:Alkenes / Q000737:chemistry; D002384:Catalysis; D017743:Equipment Reuse; D006865:Hydrogenation; D007093:Imidazoles / Q000737:chemistry*; D052578:Ionic Liquids / Q000737:chemistry*; D053768:Metal Nanoparticles / Q000737:chemistry* / Q000648:ultrastructure; D008823:Micelles; D046529:Microscopy, Electron, Transmission; D009532:Nickel / Q000737:chemistry*; D009574:Nitro Compounds / Q000737:chemistry; D056951:Photoelectron Spectroscopy; D011060:Poloxalene / Q000737:chemistry*; D014867:Water / Q000737:chemistry
chemical_list: C525965:1-butyl-2,3-dimethylimidazolium; D000475:Alkenes; D007093:Imidazoles; D052578:Ionic Liquids; D008823:Micelles; D009574:Nitro Compounds; D014867:Water; C464484:pluronic block copolymer P123; D009532:Nickel; D011060:Poloxalene
keywords: Aqueous phase; Ionic liquids; Ni nanoparticles; Selective hydrogenation; Triblock polymers P123