Infrared study of CO adsorption on Pt-Rh/SiO2 catalysts

James A. Anderson, F. Solymosi

Research output: Contribution to journalArticle

18 Citations (Scopus)

Abstract

Infrared spectra are reported of CO adsorbed on Pt/SiO2, Rh/SiO2 and Pt-Rh/SiO2 in the temperature ranges 93-300 and 303-573 K. CO adsorption as a function of time was studied for high-temperature reduced samples (973 K). The influence of platinum was to decrease the rate at which the rhodium gem-dicarbonyl species was formed and to increase the rate at which metal clusters were reformed. Coupling effects between Pt-CO and Rh-CO at low temperatures indicate that crystallites exist containing well mixed surface layers of platinum and rhodium atoms. The effect of platinum on rhodium particle morphology is discussed.

Original languageEnglish
Pages (from-to)3435-3442
Number of pages8
JournalJournal of the Chemical Society - Faraday Transactions
Volume87
Issue number20
DOIs
Publication statusPublished - 1991

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Carbon Monoxide
rhodium
Rhodium
platinum
Platinum
Infrared radiation
Adsorption
catalysts
Catalysts
adsorption
metal clusters
Gems
crystallites
surface layers
infrared spectra
Crystallites
Temperature
Metals
Atoms
atoms

ASJC Scopus subject areas

  • Physical and Theoretical Chemistry

Cite this

Infrared study of CO adsorption on Pt-Rh/SiO2 catalysts. / Anderson, James A.; Solymosi, F.

In: Journal of the Chemical Society - Faraday Transactions, Vol. 87, No. 20, 1991, p. 3435-3442.

Research output: Contribution to journalArticle

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