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Effect of Structural Properties of mesoporous co3o4 Catalysts on Methane combustion

Chemical Research in Chinese Universities 2016年第5期32卷 808-811页

作者： JIA Yongchang WANG Shuyuan LU Jiqing LUo Mengfei Key Laboratory of the Ministry of Education for Advanced Catalysis Materials Institute of Physical Chemistry Zhejiang Normal University Jinhua 321004 P R. China

Highly ordered 2D and 3D-co3o4 catalysts were prepared using SBA-15 and KIT-6 as templates. Na- no-co304 catalyst was obtained by calcination of cobalt nitrate as a comparison. The BET surface area of nano- co304, 2D-co3o4 and 3D-co3o4 catalysts was 16.2, 63.9 and 75.1 mE/g, respectively. All the catalysts were tested for the total combustion of methane and their catalytic performance was in the order of 3D-co3o4（T90=355℃）〉 2D-coao4（T90=383℃）〉nano-co3o4（T90=455℃）. It was also found that the order of the areal specific reaction rates for the combustion of methane followed the same order of total activity. The characterization result demonstrates that enhanced catalytic performance of methane of the 2D-co3o4 and 3D-co3o4 catalysts is due to their pronounced reducibility and abundant active co3o4 species, which was caused by the preferential exposure of {220} crystal planes in 3D-co3o4 and 2D-co3o4 catalysts compared to the nano-co3o4.

关键词： mesoporous co3o4 Hard template CH4 oxidation KIT-6 SBA-15

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mesoporous cobalt oxide for largely improved lithium storage properties

引用

Chinese Chemical Letters 2012年第8期23卷 949-952页

作者： Mai Xia Ma Faculty of Chemistry and Material Science Langfang Teachers CollegeLangfang 065000China

We report the microstructure, application for lithium-ion batteries of mesoporous co304 prepared by modified KIT-6 template method. The sample was characterized by XRD, TEM, HRTEM and nitrogen adsorption. Their electrochemical behaviors as electrode reactants for lithium ion batteries were evaluated by cyclic voltammograms and static charge-discharge. A direct comparison of electrochemical behaviors between mesoporous nanostructure and bulk reflects interesting ＂nanostructure effect＂, which is reasonably discussed in terms of how the 3D nanostructures of co3o4 materials function in tuning their electrochemistry. The results demonstrate that further improvement of electrochemical performance in transition metal-oxide-based anode materials can be realized via the design of multiporous nanostructured materials.

关键词： mesoporous co3o4 High lithium storage capacity Nanostructure effect

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