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Effect of Preparation Method and Support on Catalytic Behavior of Rhodium Nanoparticles in Styrene Hydrogenation

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Abstract

The Rh nanoparticles supported on silica were prepared by hydrazine reduction in aqueous medium. The obtained catalysts are characterized by X-ray diffraction, transmission electronic microscopy, and energy dispersive X-ray analysis. Their catalytic performances were evaluated in the hydrogenation of styrene. The results show that the catalytic activity has been greatly affected by the temperature, silica support and the method of preparation. The activity of supported catalyst is about 12 times that of the unsupported systems. Moreover, the catalytic activity of the supported catalysts increases when the Rh loading decreases. This is ascribed to the degree of the metal dispersion, which increases with a decrease in the Rh loading in the catalysts. The results reveal also that the catalyst prepared by programmed temperature reduction seems to be more catalytically active than the catalyst prepared by the isothermal reduction procedure.

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Authors and Affiliations

  1. Catalysis Group, Laboratory of Applied Chemistry, Box 401, University of Guelma, 24000, Guelma, Algeria

    H. Gherib & A. G. Boudjahem

  2. Institute Jean Lamour UMR 7198, Competence Center X-gamma (Diffraction-Diffusion-Imaging X and Spectroscopy Mössbauer), CNRS Faculty of Science, University of Lorraine, Bvd. Aiguillettes, B.P. 239, 54506, Vandoeuvre-les-Nancy Cedex, France

    G. Medjahdi

Authors
  1. H. Gherib
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  2. A. G. Boudjahem
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  3. G. Medjahdi
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Correspondence to H. Gherib or A. G. Boudjahem.

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Abbreviations: EDX, energy dispersive X-ray analysis; TEM, transmission electronic microscopy; XRD, X-ray diffraction.

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Gherib, H., Boudjahem, A.G. & Medjahdi, G. Effect of Preparation Method and Support on Catalytic Behavior of Rhodium Nanoparticles in Styrene Hydrogenation. Kinet Catal 61, 466–472 (2020). https://doi.org/10.1134/S0023158420030106

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  • DOI: https://doi.org/10.1134/S0023158420030106

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