Amorphous Ni–B/SiO2 catalyst prepared by microwave heating and its catalytic activityin acrylonitrile hydrogenation

✍ Scribed by Bo Liu; Minghua Qiao; Jianqiang Wang; Songhai Xie; Hexing Li; Kangnian Fan

• Book ID: 102326517
• Publisher: Wiley (John Wiley & Sons)
• Year: 2003
• Tongue: English
• Weight: 246 KB
• Volume: 78
• Category: Article
• ISSN: 0268-2575
• DOI: 10.1002/jctb.817

✦ Synopsis

Abstract

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