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Indexed by:期刊论文

Date of Publication:2014-09-01

Journal:JOURNAL OF SOLID STATE CHEMISTRY

Included Journals:SCIE、EI

Volume:217

Page Number:105-112

ISSN No.: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.