Studies of Pt-Sn/Al sub 2 O sub 3 catalysts prepared by Pt and Sn coevaporation (Solvated Metal Atom Dispersion)

Journal Article · Thu Nov 01 00:00:00 EST 1990 · Journal of Catalysis; (USA)

DOI:https://doi.org/10.1016/0021-9517(90)90055-O· OSTI ID:5679697

Li, Yongxi; Klabunde, K J ^[1]

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1. Kansas State Univ., Manhattan (USA)

Metal atoms of Pt and Sn have been solvated at low temperatures, and these solvated metal atoms have been used for depositing Pt-Sn bimetallic particles on Al{sub 2}O{sub 3} (full SMAD methods). Spectroscopic investigations with XPS, XRD, EXAFS, and Moessbauer have confirmed the presence of very small and/or amorphous Pt-Sn particles. Catalytic performance tests show that these particles are active for dehydrocyclization reactions, but depress unwanted hydrogenolysis reactions. These results, compared with results for conventionally prepared and half-SMAD methods (Sn{sup 0} on performed Pt particles), show that Sn{sup 0} within and on Pt particles has a significant effect on catalyst performance, and suggest that such performance can be predictably modified by using the correct preparation procedure (SMAD or conventional). The effect of tin is also perhaps now better understood due to these results.

• OSTI ID: 5679697
• Journal Information: Journal of Catalysis; (USA), Vol. 126:1; ISSN 0021-9517
• Country of Publication: United States
• Language: English

Related Subjects

37 INORGANIC
ORGANIC
PHYSICAL AND ANALYTICAL CHEMISTRY
CATALYSTS
CHEMICAL PREPARATION
PLATINUM
CATALYTIC EFFECTS
TIN
ALUMINIUM OXIDES
BIMETALS
CATALYST SUPPORTS
DEHYDROGENATION
DEPOSITION
EVAPORATION
MOESSBAUER EFFECT
PERFORMANCE
PHOTOELECTRON SPECTROSCOPY
SPECTROSCOPY
VALENCE
X-RAY DIFFRACTION
X-RAY SPECTROSCOPY
ALUMINIUM COMPOUNDS
CHALCOGENIDES
CHEMICAL REACTIONS
COHERENT SCATTERING
DIFFRACTION
ELECTRON SPECTROSCOPY
ELEMENTS
METALS
OXIDES
OXYGEN COMPOUNDS
PHASE TRANSFORMATIONS
PLATINUM METALS
SCATTERING
SYNTHESIS
TRANSITION ELEMENTS
400201* - Chemical & Physicochemical Properties