Highly Selective Hydrogenation with Ionic Liquid Stabilized Nickel Nanoparticles

• Published in: Catalysis letters Vol. 148; no. 5; pp. 1336 - 1344
• Main Authors: Jiang, He-yan, Zhang, Si-shi, Sun, Bin
• Format: Journal Article
• Language: English
• Published: New York Springer US 01-05-2018; Springer; Springer Nature B.V
• Subjects: Analysis; Aromatic compounds; Catalysis; Chemistry; Chemistry and Materials Science; Hydrazines; Hydrogenation; Image transmission; Industrial Chemistry/Chemical Engineering; Ionic liquids; Ions; Nanoparticles; Nickel; Nickel (Metal); Nitro compounds; Nitroaromatic compounds; Organometallic Chemistry; Photoelectrons; Physical Chemistry; Quinoline; Solvents; Spectrum analysis; Thermogravimetric analysis; Transmission electron microscopy; X-ray diffraction; X-ray spectroscopy; Nanoparticles; Ionic liquids; Quinoline; Nickel; Chemoselective hydrogenation
• ISSN: 1011-372X; 1572-879X
• DOI: 10.1007/s10562-018-2361-0

Nickel nanoparticles (Ni NPs) were conveniently synthesized from the reduction of nickel(II) salt with NaBH
4
or hydrazine in the presence of the ionic liquid 1-butyl-2,3-dimethylimidazolium (
S
)-2-pyrrolidinecarboxylic acid salt. UV/Vis spectroscopy, thermogravimetric analysis, and X-ray photoelectron spectroscopy were employed to characterize the interaction between the metal and the ionic liquid. The face-centered cubic structure of the Ni NPs(0) was confirmed by X-ray diffraction characterization. Transmission electron microscopy images revealed well-dispersed Ni particles of approximately 5.1 nm in average diameter. The ionic liquid immobilized Ni NPs were employed as highly efficient catalysts in chemoselective hydrogenation of quinoline and relevant compounds, as well as aromatic nitro compounds under mild reaction conditions. The Ni NPs can be efficiently recovered and reused.
Graphical Abstract