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Catalytic activity of Co/MCM-41 and Co/SBA-15 materials in toluene oxidation

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Abstract

Cobalt-containing MCM-41 and SBA-15 mesoporous materials were prepared by the pH-adjusting of the impregnation solution. The modified materials were investigated by X-ray diffraction, N2 physisorption, temperature-programmed reduction, DR UV–Vis diffuse reflectance, and FT-IR spectroscopy of adsorbed pyridine. The pH of the impregnation solution influences the surface charge of the mesoporous support and therefore determines the strength of interaction between the cobalt precursor and the mesoporous support. The formation of different cobalt oxide species in different ratios, depending on the pH of the impregnation solution, was established for both materials. The modified Co/MCM-41 and Co/SBA-15 materials were active in toluene oxidation. Their catalytic activity is predetermined by the nature, the reducibility, and the dispersion of the obtained cobalt oxide species.

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Acknowledgements

Financial support by the Hungarian Research Fund (OTKA, Project No. F61972), by the project BУ-X-305/07 and the Bulgarian-Hungarian Inter-academic Exchange Agreement are greatly acknowledged. The authors thank to Dr. M. Dimitrov and Dr. N. Kostova for the N2 physisorption and DR UV–Vis measurements, respectively.

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Authors and Affiliations

  1. Institute of Nanochemistry and Catalysis, Chemical Research Center, Hungarian Academy of Sciences, Pusztaszeri út 59-67, 1025, Budapest, Hungary

    Ágnes Szegedi

  2. Institute of Organic Chemistry with Center of Phytochemistry, Bulgarian Academy of Sciences, 1113, Sofia, Bulgaria

    Margarita Popova & Christo Minchev

Authors
  1. Ágnes Szegedi
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  2. Margarita Popova
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  3. Christo Minchev
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Correspondence to Ágnes Szegedi.

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Szegedi, Á., Popova, M. & Minchev, C. Catalytic activity of Co/MCM-41 and Co/SBA-15 materials in toluene oxidation. J Mater Sci 44, 6710–6716 (2009). https://doi.org/10.1007/s10853-009-3600-y

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  • DOI: https://doi.org/10.1007/s10853-009-3600-y

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