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

M. Primet; J. M. Basset; E. Garbowski; M. V. Mathieu

doi:10.1021/ja00846a015

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

M. Primet, J. M. Basset^*, E. Garbowski, M. V. Mathieu

^*Corresponding author for this work

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

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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 language	English (US)
Pages (from-to)	3655-3659
Number of pages	5
Journal	Journal of the American Chemical Society
Volume	97
Issue number	13
DOIs	https://doi.org/10.1021/ja00846a015
State	Published - Jun 1 1975
Externally published	Yes

ASJC Scopus subject areas

Catalysis
General Chemistry
Biochemistry
Colloid and Surface Chemistry

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

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 {\AA}. 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.",

author = "M. Primet and Basset, {J. M.} and E. Garbowski and Mathieu, {M. V.}",

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AU - Primet, M.

AU - Basset, J. M.

AU - Garbowski, E.

AU - Mathieu, M. V.

PY - 1975/6/1

Y1 - 1975/6/1

N2 - 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.

AB - 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.

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ER -

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

Abstract

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