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Amorphous Ni–B/SiO 2 catalyst prepared by microwave heating and its catalytic activityin acrylonitrile hydrogenation
Author(s) -
Liu Bo,
Qiao Minghua,
Wang Jianqiang,
Xie Songhai,
Li Hexing,
Fan Kangnian
Publication year - 2003
Publication title -
journal of chemical technology and biotechnology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.64
H-Index - 117
eISSN - 1097-4660
pISSN - 0268-2575
DOI - 10.1002/jctb.817
Subject(s) - catalysis , acrylonitrile , microwave , chemisorption , materials science , x ray photoelectron spectroscopy , amorphous solid , chemical engineering , thermal stability , phase (matter) , alloy , organic chemistry , chemistry , metallurgy , composite material , polymer , copolymer , physics , quantum mechanics , engineering
Microwave heating was utilized in the preparation of amorphous Ni–B/SiO 2 catalysts. After wetness impregnation with NiCl 2 aqueous solution, the catalyst precursor was dried at 383 K, followed by microwave heating and KBH 4 reduction. Liquid phase hydrogenation of acrylonitrile was employed as the probe reaction. While ICP, XRD, XPS and turnover frequency results did not reveal discernable structural and electronic differences between the active components of the catalysts with or without microwave heating, SEM uncovered the formation of smaller Ni–B alloy particles with microwave heating, leading to a higher concentration of active sites and greater thermal stability as verified by H 2 chemisorption and DSC. Copyright © 2003 Society of Chemical Industry