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论文类型：期刊论文

发表时间：2014-09-01

发表刊物：JOURNAL OF SOLID STATE CHEMISTRY

收录刊物：SCIE、EI

卷号：217

页面范围：105-112

ISSN号：0022-4596

关键字：Microwave-assisted preparation; Cobalt silicides; Hydrogenation; Phthalic anhydride

摘要：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.