Investigation of CO and formaldehyde oxidation over mesoporous Ag/Co3O4 catalysts

能源化学(英文) ›› 2013, Vol. 22 ›› Issue (6): 845-852.

Investigation of CO and formaldehyde oxidation over mesoporous Ag/Co₃O₄ catalysts

Fangli Yu^a, Zhenping Qu^a, Xiaodong Zhang^a, Qiang Fu^b, Yi Wang^a

a. Key Laboratory of Industrial Ecology and Environmental Engineering (MOE), School of Environmental Science and Technology, Dalian University of Technology, Dalian 116024, Liaoning, China;
b. State Key Laboratory of Catalysis, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian 116023, Liaoning, China

收稿日期:2013-04-09 修回日期:2013-05-22 出版日期:2013-11-20 发布日期:2013-11-28
通讯作者: Zhenping Qu
基金资助:
This work was supported financially by the Program for New Century Excellent Talents in University (NCET-09-0256), the Fundamental Research Funds for the Central Universities (DUT13LK27) and the National Nature Science Foundation of China (No. 21377016).

Investigation of CO and formaldehyde oxidation over mesoporous Ag/Co₃O₄ catalysts

Fangli Yu^a, Zhenping Qu^a, Xiaodong Zhang^a, Qiang Fu^b, Yi Wang^a

a. Key Laboratory of Industrial Ecology and Environmental Engineering (MOE), School of Environmental Science and Technology, Dalian University of Technology, Dalian 116024, Liaoning, China;
b. State Key Laboratory of Catalysis, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian 116023, Liaoning, China

Received:2013-04-09 Revised:2013-05-22 Online:2013-11-20 Published:2013-11-28
Supported by:
This work was supported financially by the Program for New Century Excellent Talents in University (NCET-09-0256), the Fundamental Research Funds for the Central Universities (DUT13LK27) and the National Nature Science Foundation of China (No. 21377016).

摘要/Abstract

摘要： CO and formaldehyde (HCHO) oxidation reactions were investigated over mesoporous Ag/Co₃O₄ catalysts prepared by one-pot (OP) and impregnation (IM) methods. It was found that the one-pot method was superior to the impregnation method for synthesizing Ag/Co₃O₄ catalysts with high activity for both reactions. It was also found that the catalytic behavior of mesoporous Co₃O₄ and Ag/Co₃O₄ catalysts for the both reactions was different. And the addition of silver on mesoporous Co₃O₄ did not always enhance the catalytic activity of final catalyst for CO oxidation at room temperature (20 ℃), but could significantly improve the catalytic activity of final catalyst for HCHO oxidation at low temperature (90 ℃). The high surface area, uniform pore structure and the pretty good dispersion degree of the silver particle should be responsible for the excellent low-temperature CO oxidation activity. However, for HCHO oxidation, the addition of silver played an important role in the activity enhancement. And the silver particle size and the reducibility of Co₃O₄ should be indispensable for the high activity of HCHO oxidation at low temperature.

关键词: mesoporous materials, Co₃O₄, Ag, CO oxidation, HCHO oxidation

Abstract: CO and formaldehyde (HCHO) oxidation reactions were investigated over mesoporous Ag/Co₃O₄ catalysts prepared by one-pot (OP) and impregnation (IM) methods. It was found that the one-pot method was superior to the impregnation method for synthesizing Ag/Co₃O₄ catalysts with high activity for both reactions. It was also found that the catalytic behavior of mesoporous Co₃O₄ and Ag/Co₃O₄ catalysts for the both reactions was different. And the addition of silver on mesoporous Co₃O₄ did not always enhance the catalytic activity of final catalyst for CO oxidation at room temperature (20 ℃), but could significantly improve the catalytic activity of final catalyst for HCHO oxidation at low temperature (90 ℃). The high surface area, uniform pore structure and the pretty good dispersion degree of the silver particle should be responsible for the excellent low-temperature CO oxidation activity. However, for HCHO oxidation, the addition of silver played an important role in the activity enhancement. And the silver particle size and the reducibility of Co₃O₄ should be indispensable for the high activity of HCHO oxidation at low temperature.

Key words: mesoporous materials, Co₃O₄, Ag, CO oxidation, HCHO oxidation

Fangli Yu, Zhenping Qu, Xiaodong Zhang, Qiang Fu, Yi Wang. Investigation of CO and formaldehyde oxidation over mesoporous Ag/Co₃O₄ catalysts[J]. 能源化学(英文), 2013, 22(6): 845-852.

Fangli Yu, Zhenping Qu, Xiaodong Zhang, Qiang Fu, Yi Wang. Investigation of CO and formaldehyde oxidation over mesoporous Ag/Co₃O₄ catalysts[J]. Journal of Energy Chemistry, 2013, 22(6): 845-852.

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Investigation of CO and formaldehyde oxidation over mesoporous Ag/Co₃O₄ catalysts

Investigation of CO and formaldehyde oxidation over mesoporous Ag/Co₃O₄ catalysts

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