Identification of dispersed platinum on γ-alumina by laser-Raman spectroscopy

Laser-Raman spectroscopy (LRS) is applied to identify highly dispersed Pt on γ-alumina. Under conditions favorable for dispersed Pt three peaks are observed at about 125,335 and 590 cm −1. Indications are that dispersed Pt coexists with particulate Pt even at concentrations as high as 30wt%Pt γ−Al 2...

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Bibliographic Details
Published inApplied surface science Vol. 37; no. 2; pp. 250 - 257
Main Authors Otto, K., Weber, W.H., Graham, G.W., Shyu, J.Z.
Format Journal Article
LanguageEnglish
Published Amsterdam Elsevier B.V 1989
Elsevier Science
Subjects
Catalysis
Catalysts: preparations and properties
Catalytic reactions
Chemistry
Exact sciences and technology
General and physical chemistry
General. Nomenclature, chemical documentation, computer chemistry
Theory of reactions, general kinetics
Theory of reactions, general kinetics. Catalysis. Nomenclature, chemical documentation, computer chemistry
Laser beam
Platinum
Transition metal
Raman spectrometry
Experimental study
Structure
Alumina
Platinoid
Supported catalyst
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Summary:Laser-Raman spectroscopy (LRS) is applied to identify highly dispersed Pt on γ-alumina. Under conditions favorable for dispersed Pt three peaks are observed at about 125,335 and 590 cm −1. Indications are that dispersed Pt coexists with particulate Pt even at concentrations as high as 30wt%Pt γ−Al 2O 3 . The method can be used to study sintering and redispersion of Pt as a function of temperature and gas-phase composition.
ISSN:0169-4332
1873-5584
DOI:10.1016/0169-4332(89)90487-X