Control of porosity and composition of carbon based catalysts prepared by template assisted routes

Control of porosity and composition of carbon based catalysts prepared by template assisted routes
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模板辅助路线制备的碳基催化剂的孔隙率和组成的控制

DOI:
10.1016/j.cattod.2014.10.036
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发表时间:
2015
期刊:
影响因子:
5.3
通讯作者:
P. Kustrowski
P. Kustrowski
中科院分区:
化学2区
文献类型:
--
作者:
S. Utgenannt;F. Hansen;O. Klepel;S. Jarczewski;A. Wach;P. Kustrowski

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采用模板辅助法制备了用于乙苯氧化脱氢的碳基催化剂。使用这种合成程序,碳可以根据其表面积和组成(即氮量)进行系统的修饰。分别以介孔二氧化硅和多孔混凝土为硬模板,以蔗糖水溶液为碳源。氮素是由尿素部分取代溶液中的蔗糖引入的。采用−-196℃氮气吸附、X-射线衍射仪、拉曼光谱、X-射线光电子能谱对材料进行了表征,并考察了其催化乙苯氧化脱氢反应的性能。并从碳催化剂的织构性质和含氮量两个方面讨论了其催化活性。
Carbon based catalysts for the oxidative dehydrogenation of ethylbenzene were prepared by a template assisted route. Using that synthesis procedure, the carbons could be modified systematically regarding their surface area and composition (namely the amount of nitrogen). Mesoporous silica and porous concrete, respectively, were used as the hard templates, whereas an aqueous solution of sucrose was the carbon source. Nitrogen was introduced by urea which partially replaced the sucrose in the solution. The materials were characterized by means of nitrogen adsorption at −196 °C, X-ray diffraction (XRD), Raman spectroscopy, X-ray photoelectron spectroscopy (XPS), and tested as catalysts in the oxidative dehydrogenation (ODH) of ethylbenzene. The catalytic activity was discussed with regard to the textural properties and the nitrogen content in the carbon catalysts.
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发表时间: 2013
期刊: Catalysis Letters
影响因子: 2.8
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