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

J. M. Basset; G. Dalmai-Imelik; M. Primet; R. Mutin

doi:10.1016/0021-9517(75)90130-X

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

J. M. Basset^*, G. Dalmai-Imelik, M. Primet, R. Mutin

^*Corresponding author for this work

Research output: Contribution to journal › Article › peer-review

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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 language	English (US)
Pages (from-to)	22-36
Number of pages	15
Journal	Journal of Catalysis
Volume	37
Issue number	1
DOIs	https://doi.org/10.1016/0021-9517(75)90130-X
State	Published - Apr 1975
Externally published	Yes

ASJC Scopus subject areas

Catalysis
Physical and Theoretical Chemistry

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10.1016/0021-9517(75)90130-X

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title = "A study of benzene hydrogenation and identification of the adsorbed species with Pt Al2O3 catalysts",

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 {\AA}), 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.",

author = "Basset, {J. M.} and G. Dalmai-Imelik and M. Primet and R. Mutin",

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T1 - A study of benzene hydrogenation and identification of the adsorbed species with Pt Al2O3 catalysts

AU - Basset, J. M.

AU - Dalmai-Imelik, G.

AU - Primet, M.

AU - Mutin, R.

PY - 1975/4

Y1 - 1975/4

N2 - 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.

AB - 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.

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

Abstract

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