A study of benzene hydrogenation and identification of the adsorbed species with Pt Al2O3 catalysts

Jean-Marie Maurice Basset*, G. Dalmai-Imelik, M. Primet, R. Mutin

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

128 Scopus citations

Abstract

The turnover number for benzene hydrogenation over various Pt/alumina catalysts has been found to be constant. It does not depend upon the particle size distribution which varied considerably in the "mitohedral" range (10-50 Å), nor did it vary either with the complex of impregnation (H2PtCl6) or Pt(NO2)2(NH3)2, or with the chlorine content. The value obtained is very close to that obtained by other authors. The results confirm that benzene hydrogenation is a structure-insensitive reaction. Various infrared investigations have explained the "facile" character of the reaction: all the surface platinum atoms are active sites for benzene or hydrogen adsorption. Benzene is adsorbed on a single platinum atom (as for π arene complexes) with a global transfer of electrons toward platinum, and there is no surface steric requirement for adsorption. Hydrogen responsible for the catalytic activity is reversibly and weakly adsorbed.

Original languageEnglish (US)
Pages (from-to)22-36
Number of pages15
JournalJournal of Catalysis
Volume37
Issue number1
DOIs
StatePublished - Jan 1 1975

ASJC Scopus subject areas

  • Catalysis
  • Physical and Theoretical Chemistry

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