Determination of the dispersion of supported Pt particles by gas-phase and liquid-phase measurements

Hilal Kivrak, Ágnes Mastalir, Zoltán Király, Deniz Uner

Research output: Contribution to journalArticle

9 Citations (Scopus)

Abstract

The dispersion of a Pt/γ-Al2O3 catalyst was investigated by various experimental techniques. The values obtained by gas-phase hydrogen and carbon monoxide adsorption and transmission electron microscopy (TEM) were consistent for the metal:adsorbate stoichiometry of 1:1. However, these methods overestimated the number of active sites available for a liquid-phase reaction. For the hydrogenation of styrene in the presence of CS2 as a catalyst poison, only the defect sites were found to be active in the catalytic reaction. The defect sites were related to the initial coverage dependent region of the adsorption heats measured by gas-phase microcalorimetry.

Original languageEnglish
Pages (from-to)1002-1005
Number of pages4
JournalCatalysis Communications
Volume10
Issue number6
DOIs
Publication statusPublished - Feb 15 2009

Keywords

  • CS poisoning
  • Microcalorimetry
  • Pt
  • Styrene hydrogenation

ASJC Scopus subject areas

  • Catalysis
  • Chemistry(all)
  • Process Chemistry and Technology

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