Release Time:2019-03-09  Hits:

Indexed by: Journal Article

Date of Publication: 2014-09-01

Journal: JOURNAL OF SOLID STATE CHEMISTRY

Included Journals: EI、SCIE

Volume: 217

Page Number: 105-112

ISSN: 0022-4596

Key Words: Microwave-assisted preparation; Cobalt silicides; Hydrogenation; Phthalic anhydride

Abstract: CoSix/CNTs catalysts with different CoSix phases (CoSi, CoSi2) have been rapidly synthesized via a microwave-assisted route and applied for the liquid phase hydrogenation of phthalic anhydride. The synthesized catalysts were analyzed and characterized by X-ray diffraction, X-ray photoelectron spectroscopy, transmission electron microscopy-energy dispersive X-ray spectroscopy, thermogravimetric/derivative thermogravimetric analysis. The reaction progress of cobalt silicides and the ratio of Co:Si were monitored at different microwave irradiation times by XRD, giving insight into the formation mechanism. Compared to the Co/CNTs catalyst, all the prepared CoSix/CNTs catalysts exhibited excellent activity and good selectivity to phthalide under mild reaction conditions (180-220 degrees C and 4.0 MPa H-2). This novel methodology can be applied to the synthesis of other transition metal suicides such as FeSi, Ni2Si, and Cu4Si. (C) 2014 Elsevier Inc. All rights reserved.