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CO Oxidation Catalyzed by Ag/SBA-15 Catalysts Prepared via in situ Reduction: The Influence of Reducing Agents

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Abstract

Ag/SBA-15 catalysts have been prepared by means of in situ reduction methods using hexamethylenetetramine and formaldehyde as reducing agents, respectively, and characterized by N2 adsorption/desorption, XRD, TEM and XPS. Presence of nanoparticles of silver in SBA-15 were confirmed by high angle X-ray diffraction data (peaks between 2θ = 35–80º) and XPS, and transmission electron microscopy confirmed the diameter of the nanoparticles. When hexamethylenetetramine was used as reducing agent, uniform Ag nanoparticles inside the channels were formed, and diameter of nanoparticles is found to be ~6.0 nm which is coincident with channel diameter of SBA-15. The catalysts were subjected to CO oxidation in a flow reactor at atmospheric pressure and temperatures up to 300 °C. Studies revealed that catalysts prepared with different reducing agents strongly influence their catalytic performance in the CO oxidation, what prepared with hexamethylenetetramine as mild reducing reagent shows a certain low temperature catalytic activity.

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Acknowledgments

This work was financially supported by the National Natural Science Foundation of China (grant 20872135) and China National Tobacco Corporation.

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Authors and Affiliations

  1. Department of Chemistry, University of Science and Technology of China, 230026, Hefei, China

    Dong Tian, Guoping Yong, Xiangyang Yan & Shaomin Liu

  2. Department of Chemistry, Huainan Normal College, 232001, Huainan, China

    Dong Tian

  3. Technology Center, China Tobacco ChuanYu Industrial Corporation, 610017, Chengdou, China

    Ya Dai

Authors
  1. Dong Tian
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  2. Guoping Yong
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  3. Ya Dai
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  4. Xiangyang Yan
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  5. Shaomin Liu
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Correspondence to Guoping Yong or Shaomin Liu.

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Tian, D., Yong, G., Dai, Y. et al. CO Oxidation Catalyzed by Ag/SBA-15 Catalysts Prepared via in situ Reduction: The Influence of Reducing Agents. Catal Lett 130, 211–216 (2009). https://doi.org/10.1007/s10562-009-9865-6

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  • DOI: https://doi.org/10.1007/s10562-009-9865-6

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