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高等学校化学研究 ›› 2016, Vol. 32 ›› Issue (5): 808-811.doi: 10.1007/s40242-016-6141-3

• Articles • 上一篇    下一篇

Effect of Structural Properties of Mesoporous Co3O4 Catalysts on Methane Combustion

JIA Yongchang, WANG Shuyuan, LU Jiqing, LUO Mengfei   

  1. Key Laboratory of the Ministry of Education for Advanced Catalysis Materials, Institute of Physical Chemistry, Zhejiang Normal University, Jinhua 321004, P. R. China
  • 收稿日期:2016-04-11 修回日期:2016-05-19 出版日期:2016-10-01 发布日期:2016-06-20
  • 通讯作者: LUO Mengfei E-mail:mengfeiluo@zjnu.cn
  • 基金资助:

    Supported by the National Natural Science Foundation of China(No.21373186).

Effect of Structural Properties of Mesoporous Co3O4 Catalysts on Methane Combustion

JIA Yongchang, WANG Shuyuan, LU Jiqing, LUO Mengfei   

  1. Key Laboratory of the Ministry of Education for Advanced Catalysis Materials, Institute of Physical Chemistry, Zhejiang Normal University, Jinhua 321004, P. R. China
  • Received:2016-04-11 Revised:2016-05-19 Online:2016-10-01 Published:2016-06-20
  • Contact: LUO Mengfei E-mail:mengfeiluo@zjnu.cn
  • Supported by:

    Supported by the National Natural Science Foundation of China(No.21373186).

摘要：

Highly ordered 2D and 3D-Co3O4 catalysts were prepared using SBA-15 and KIT-6 as templates. Nano-Co3O4 catalyst was obtained by calcination of cobalt nitrate as a comparison. The BET surface area of nano-Co3O4, 2D-Co3O4 and 3D-Co3O4 catalysts was 16.2, 63.9 and 75.1 m2/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-Co3O4(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 Co3+ 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

Abstract:

Highly ordered 2D and 3D-Co3O4 catalysts were prepared using SBA-15 and KIT-6 as templates. Nano-Co3O4 catalyst was obtained by calcination of cobalt nitrate as a comparison. The BET surface area of nano-Co3O4, 2D-Co3O4 and 3D-Co3O4 catalysts was 16.2, 63.9 and 75.1 m2/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-Co3O4(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 Co3+ species, which was caused by the preferential exposure of {220} crystal planes in 3D-Co3O4 and 2D-Co3O4 catalysts compared to the nano-Co3O4.

Key words: Mesoporous Co3O4, Hard template, CH4 oxidation, KIT-6, SBA-15