IR spectroscopic investigation of the particle size and morphology of platinum nanoparticles supported on mesoporous silicate

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Abstract

Platinum supported on SBA-15 mesoporous silicate was prepared by a two-step procedure. The catalyst was characterized by TEM, XRD, MAS-NMR and IR spectroscopy and BET, TG-DTG measurements. The catalytic activity of the Pt containing silicate was investigated by IR spectroscopy using cyclohexene hydrogenation and dehydrogenation reaction. The changes occurred both in the gas phase and the adsorbed phase were monitored simultaneously. The quantitative analysis of the bands showed that even kinetic experiments could be performed using the set-up reported. We found that the catalytic activity is influenced by the size and shape of the Pt nanoparticles (the smaller the size the higher is the catalytic activity) and the preparation of the catalyst (the highest performance was found for catalyst prepared by ultrasonic treatment aided impregnation).

Original languageEnglish
Pages (from-to)1351-1358
Number of pages8
JournalStudies in Surface Science and Catalysis
Volume158 B
Publication statusPublished - Jan 1 2005

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ASJC Scopus subject areas

  • Catalysis
  • Condensed Matter Physics
  • Physical and Theoretical Chemistry
  • Surfaces, Coatings and Films
  • Materials Chemistry

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