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Deep Oxidation of Methane on a Pt/Si3N4 Catalyst

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Abstract

We have studied platinum catalysts supported on silicon nitride Si3N4 in the process of deep oxidation of methane. We have used transmission electron microscopy and X-ray photoelectron spectroscopy to study the surface properties of the Pt/Si3N4 samples before and after the catalytic reaction. We have established that the metallic platinum particles in freshly prepared systems are characterized by average sizes of 1.7-5.3 nm, while after the catalytic reaction we observe formation of Pt crystallites up to 30-70 nm in size. We hypothesize that the observed deactivation of platinum catalysts in deep oxidation of methane is connected with crystallization of the metallic particles and their entrainment with the reaction products during catalysis.

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Authors and Affiliations

  1. Tomsk State University of Civil Engineering, 2 Solyanaya Pl., 634003, Tomsk, Russian Federation

    I. A. Kurzina

  2. Catalysis Research Institute, 2 A. Einstein Avenue, 69626, Villeurbanne Cedex, France

    F. J. Cadete Santos Aires & J. C. Bertolini

Authors
  1. I. A. Kurzina
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  2. F. J. Cadete Santos Aires
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  3. J. C. Bertolini
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Kurzina, I.A., Cadete Santos Aires, F.J. & Bertolini, J.C. Deep Oxidation of Methane on a Pt/Si3N4 Catalyst. Theoretical and Experimental Chemistry 40, 241–245 (2004). https://doi.org/10.1023/B:THEC.0000041809.10564.dd

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  • DOI: https://doi.org/10.1023/B:THEC.0000041809.10564.dd

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