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The effect of Ag and CeO2 distribution on SBA-15 surface on the activity of Ag–CeO2/SBA-15 catalysts in CO and methanol oxidation

  • Original Paper: Sol-gel and hybrid materials for catalytic, photoelectrochemical and sensor applications
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Abstract

The series of catalysts representing the mesoporous ordered silica SBA-15 with supported silver or silver and ceria nanoparticles were synthesized by incipient wetness impregnation, characterized by the low-temperature N2 adsorption, XRD, TEM HR, TPR-H2 methods, and tested in the low-temperature CO oxidation and total oxidation of methanol. It was found that two types of silver particles are formed: small particles (<3 nm) inside the pores of the SBA-15 and larger particles (3–15 nm) on the external surface of SBA-15. High activity of the prepared catalyst in oxidation of CO and methanol is attributed to both small sizes of silver particles and the Ag–CeO2 interaction. The distribution of both silver and ceria on the SBA-15 surface determines their interaction and, hence, enhances the catalytic activity in oxidative reactions due to the cooperation of active oxidative sites of silver and ceria at the Ag–CeO2 interface.

Highlights

  • Ag-containing catalysts were synthesized on the basis of mesoporous ordered silica SBA-15.

  • The formation of two types of silver particles was shown.

  • Ag–CeO2/SBA-15 catalysts are promising for low temperature oxidation of CO and methanol.

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Acknowledgements

This work was supported by the Russian Science Foundation (Grant No. 18-73-10109). The authors thank Dr. Mikhail Salaev (Tomsk State University) for language review.

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Authors and Affiliations

  1. Tomsk State University, Tomsk, Russia

    N. N. Mikheeva & G. V. Mamontov

  2. Boreskov Institute of Catalysis, Novosibirsk, Russia

    V. I. Zaikovskii

  3. Novosibirsk State University, Novosibirsk, Russia

    V. I. Zaikovskii

Authors
  1. N. N. Mikheeva
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  2. V. I. Zaikovskii
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  3. G. V. Mamontov
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Correspondence to G. V. Mamontov.

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Mikheeva, N.N., Zaikovskii, V.I. & Mamontov, G.V. The effect of Ag and CeO2 distribution on SBA-15 surface on the activity of Ag–CeO2/SBA-15 catalysts in CO and methanol oxidation. J Sol-Gel Sci Technol 92, 398–407 (2019). https://doi.org/10.1007/s10971-019-05031-1

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  • DOI: https://doi.org/10.1007/s10971-019-05031-1

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