CS2 poisoning of size-selective cubooctahedral Pd particles in styrene hydrogenation

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Abstract

The poisoning effect of carbon disulfide on cubooctahedral palladium nanoparticles (1.5, 3.0 or 4.6 nm in mean diameter) deposited on montmorillonite was investigated in the liquid-phase hydrogenation of styrene to ethylbenzene under mild conditions. The dispersion of the metal crystallites was computed as a function of the mean diameter in terms of face atoms, of edge atoms + corner atoms, and of the total number of exposed surface atoms. A linear relationship was found between the rate of hydrogenation and the fraction of low-coordination surface sites poisoned, independently of particle size, and hydrogenation ceased when these sites were quantitatively covered by poison molecules with a nominal stoichiometry of CS2:Pd = 1:2. High-coordination terrace sites are not involved in the hydrogénation reaction.

Original languageEnglish
Pages (from-to)57-59
Number of pages3
JournalCatalysis Letters
Volume95
Issue number1-2
DOIs
Publication statusPublished - May 1 2004

Keywords

  • Carbon disulfide
  • Hydrogenation
  • Montmorillonite
  • Nanoparticles
  • Palladium
  • Poisoning
  • Styrene

ASJC Scopus subject areas

  • Catalysis
  • Chemistry(all)

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