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题名: CMK-5 mesoporous carbon synthesized via chemical vapor deposition of ferrocene as catalyst support for methanol oxidation
作者: Lei, Zhibin1;  Bai, Shiying1;  Xiao, Yi1;  Dang, Liqin1;  An, Lizhen1;  Zhang, Guangning1;  Xu, Qian2
刊名: JOURNAL OF PHYSICAL CHEMISTRY C
发表日期: 2008-01-24
DOI: 10.1021/jpO77322a
卷: 112, 期:3, 页:722-731
收录类别: SCI
文章类型: Article
WOS标题词: Science & Technology ;  Physical Sciences ;  Technology
类目[WOS]: Chemistry, Physical ;  Nanoscience & Nanotechnology ;  Materials Science, Multidisciplinary
研究领域[WOS]: Chemistry ;  Science & Technology - Other Topics ;  Materials Science
英文摘要: A novel and effective method was described in this work to prepare two-dimensional hexagonally ordered mesoporous CMK-5 carbon materials. This method is based on the chemical vapor deposition (CVD) of ferrocene in the mesopores of SBA-15 at 500 degrees C, followed by graphitization at different temperatures. Both the silica/carbon composite and the resulting CMK-5 were characterized by N-2 adsorption, powder X-ray diffraction, Raman spectroscopy, transmission electron microscopy, high-resolution transmission electron microscopy (HRTEM), and thermogravimetric analysis. It was found that the ferrocene could be used as a new precursor to prepare CMK-5 nanopipes, with pipe thicknesses varying from 0.8 to 2.6 nm, by increasing the CVD time from 20 to 120 min. The resulting CMK-5 exhibits high Brunauer-Emmett-Teller (BET) surface area (1044-2449 m(2)/g) and large pore volume (1.13-2.20 cm(3)/g). The graphitization degree of the resulting CMK-5 was investigated by pyrolyzing the corresponding silica/carbon composite at different temperatures. Pyrolysis temperatures below 850 degrees C led to gradually improved graphitization degrees of CMK-5 nanopipes. Pyrolysis temperatures above 850 degrees C resulted in the partial collapse of ordered CMK-5 nanopipes accompanied by the appearance of a considerable amount of entangled graphitic ribbons. The structural evolution process of CMK-5 from ordered nanopipes to the final entangled graphitic ribbons was observed by HRTEM. The obtained CMK-5 was applied as a catalyst support of Pt for methanol oxidation. The electrochemical activities of Pt nanoparticles loaded on the CMK-5 carbon materials were investigated by cyclic voltammograms and compared with the commercial Pt/Vulcan XC-72 catalyst. It was found that the specific mass activity of Pt/CMK-5 was much higher than Pt/Vulcan XC-72.
关键词[WOS]: HIGH-SURFACE-AREA ;  GRAPHITIC PORE WALLS ;  HYDROGEN STORAGE ;  FUEL-CELL ;  NANOPOROUS CARBONS ;  PTRU NANOPARTICLES ;  SILICA TEMPLATES ;  NANOTUBES ;  PYROLYSIS ;  PRECURSOR
语种: 英语
WOS记录号: WOS:000252484000012
Citation statistics: 
内容类型: 期刊论文
URI标识: http://cas-ir.dicp.ac.cn/handle/321008/140979
Appears in Collections:中国科学院大连化学物理研究所_期刊论文

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作者单位: 1.Liaoning Normal Univ, Fac Chem & Chem Engn, Inst Chem Functionalized Mat, Dalian 116029, Liaoning, Peoples R China
2.Chinese Acad Sci, Dalian Inst Chem Phys, State Key Lab Catalysis, Dalian 116023, Peoples R China

Recommended Citation:
Lei, Zhibin,Bai, Shiying,Xiao, Yi,et al. CMK-5 mesoporous carbon synthesized via chemical vapor deposition of ferrocene as catalyst support for methanol oxidation[J]. JOURNAL OF PHYSICAL CHEMISTRY C,2008,112(3):722-731.
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