Effect of Support Calcination Temperature on Ag Structure and Catalytic Activity for CO Oxidation

doi:10.1007/s40242-016-5377-2

Chemical Research in Chinese Universities ›› 2016, Vol. 32 ›› Issue (3): 455-460.doi: 10.1007/s40242-016-5377-2

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Effect of Support Calcination Temperature on Ag Structure and Catalytic Activity for CO Oxidation

ZHANG Xiaodong, DONG Han, ZHAO Di, WANG Yin, WANG Yangang, CUI Lifeng

Environment and Low-carbon Research Center, School of Environment and Architecture, University of Shanghai for Science and Technology, Shanghai 200093, P. R. China

Received:2015-09-25 Revised:2015-12-30 Online:2016-06-01 Published:2016-01-11
Contact: ZHANG Xiaodong, CUI Lifeng E-mail:fatzhxd@126.com;lifeng.cui@gmail.com
Supported by:
Supported by the National Natural Science Foundation of China(Nos.21507086, 11305099, 41473108), the Shanghai Sailing Program, China(No.14YF1409900) and the Hujiang Foundation Research Base Program, China(Nos.B14003, D14004).

Abstract

Abstract:

SiO₂ with different nanostructures, namely hexagonal mesoporous silica(HMS), and three unordered commercial silica, were used as supports to fabricate silver catalysts using an incipient wetness impregnation method. It was found that Ag/HMS catalyst showed a high catalytic activity. Next, the HMS support was calcined at different temperatures before impregnation of AgNO₃. The effect of calcination temperature of HMS support was investigated in terms of structure and catalytic activity of Ag catalysts. The support and catalysts were characterized by N₂ adsorption-desorption isotherms, Thermogravimetric-differential thermal analyzer, X-ray diffraction, H₂-temperature program reduction and transmission electron microscopy. The results showed that calcination of HMS at an appro- priate temperature(750℃) before catalyst preparation would benefit the formation of highly dispersive small sized Ag particles on the HMS support and markedly enhance the catalytic activity of Ag/HMS catalyst toward CO oxidation.

Key words: Ag catalyst, CO oxidation, SiO₂, Calcination, Support

ZHANG Xiaodong, DONG Han, ZHAO Di, WANG Yin, WANG Yangang, CUI Lifeng. Effect of Support Calcination Temperature on Ag Structure and Catalytic Activity for CO Oxidation[J]. Chemical Research in Chinese Universities, 2016, 32(3): 455-460.

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Effect of Support Calcination Temperature on Ag Structure and Catalytic Activity for CO Oxidation

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