Influence of Metal Particle Size on the Chemisorption Properties of Supported Platinum. Analogy with Cluster Compounds

M. Primet, Jean-Marie Maurice Basset*, E. Garbowski, M. V. Mathieu

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

55 Scopus citations

Abstract

A series of catalysts, Pt-Al2O3, with various particle size distributions has been studied by electron microscopy and infrared spectroscopy and chemisorption measurements. Well-characterized narrow distributions have been obtained in the range 15-35 Å. The stretching vibration of NO irreversibly adsorbed on these supported metals is particle size dependent: the larger the size, the lower the ν(NO) vibration. This result is interpreted by assuming that the extent of the back-donation to the π* orbitals of NO+ depends on the collective properties of the crystallites. This interpretation is corroborated by the spectroscopic results obtained with platinum carbonyl clusters.

Original languageEnglish (US)
Pages (from-to)3655-3659
Number of pages5
JournalJournal of the American Chemical Society
Volume97
Issue number13
DOIs
StatePublished - Jun 1 1975

ASJC Scopus subject areas

  • Catalysis
  • Chemistry(all)
  • Biochemistry
  • Colloid and Surface Chemistry

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