Deep oxidation of methane on a Pt/Si3N4 catalyst

I. A. Kurzina, F. J. Cadete Santos Aires, J. C. Bertolini

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    Abstract

    We have studied platinum catalysts supported on silicon nitride Si 3N4 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.

    Original languageEnglish
    Pages (from-to)241-245
    Number of pages5
    JournalTheoretical and Experimental Chemistry
    Volume40
    Issue number4
    DOIs
    Publication statusPublished - Jul 2004

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    Keywords

    • Deactivation
    • Methane oxidation
    • Platinum
    • Silicon nitride

    ASJC Scopus subject areas

    • Chemistry(all)

    Cite this

    Kurzina, I. A., Cadete Santos Aires, F. J., & Bertolini, J. C. (2004). Deep oxidation of methane on a Pt/Si3N4 catalyst. Theoretical and Experimental Chemistry, 40(4), 241-245. https://doi.org/10.1023/B:THEC.0000041809.10564.dd