期刊
MATERIALS RESEARCH BULLETIN
卷 47, 期 11, 页码 3336-3343出版社
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.materresbull.2012.07.029
关键词
Amorphous materials; Chemical synthesis; Electron microscopy; Catalytic properties
资金
- National Basic Research Program of China (973 Program) [2012CB825800, 2010CB934500]
- National Natural Science Foundation of China (NSFC) [51132006, 21073127, 21071104, 91027041]
- Foundation for the Author of National Excellent Doctoral Dissertation of PR China (FANEDD) [200929]
- Priority Academic Program Development of Jiangsu Higher Education Institutions (PAPD)
- Natural Science Foundation of the Jiangsu Higher Education Institutions of China [11KJB150015]
Carbon microspheres (CMSs) with a diameter range of 2-3 mu m were prepared by the iodine-catalyzed carbonization of ethanol at low temperatures by solvothermal synthesis. The reaction time, concentrations of reactants, temperatures, different alcohols as carbon precursors and reaction environments were systematically altered to determine the optimal synthesis conditions. The size and shape were characterized by scanning and transmission electron microscopy and their structure was characterized by X-ray powder diffraction and Raman spectroscopy. Energy dispersive X-ray spectroscopy, Fourier transform infrared and X-ray photoelectron spectroscopy showed that abundant oxygen-containing functional groups remain on the surface of the carbon spheres. The formation mechanism involves iodine promotion of the oxidation of ethanol, which results in formation of the CMSs. The specific activity of the CMS-supported Pt catalyst is higher than that of a commercial Pt catalyst from E-TEK or the unsupported Pt catalyst. (C) 2012 Elsevier Ltd. All rights reserved.
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