Title: Pd segregation to the surface of bimetallic Pt-Pd particles supported on H-beta zeolite evidenced with X-ray photoelectron spectroscopy and argon cation bombardment
Authors: Fiermans, L ×
De Gryse, R
De Doncker, G
Jacobs, Pierre
Martens, Johan #
Issue Date: 2000
Series Title: Journal of catalysis vol:193 issue:1 pages:108-114
Conference: date:Katholieke Univ Leuven, Ctr Oppervlaktech Katalyse, B-3001 Heverlee, Belgium; State Univ Ghent, Vakgrp Vaste Stofwetenschappen, B-9000 Ghent, Belgium
Abstract: Bimetallic PtPd/H-beta hydrocracking catalyst samples with 1.75 and 3.5 wt% metals, Pt:Pd atomic ratio of 3:1, and metal particle size of 1.7 nm were prepared using impregnation and cation exchange of Pt2+ and Pd2+ tetrammine complexes, oxidation, and hydrogen reduction at 400 degrees C. The dispersed metal phases were characterized using XPS, The formation of bimetallic Pt-Pd particles with segregation of the palladium to the particles surfaces was evidenced by intensity changes of the Pd 3d and Pt 4d photolines upon bombardment with argon cations and by comparison with a physical mixture of monometallic Pd/H-beta and Pt/H-beta catalysts, subjected to the same treatment. (C) 2000 Academic Press.
ISSN: 0021-9517
Publication status: published
KU Leuven publication type: IT
Appears in Collections:Centre for Surface Chemistry and Catalysis
× corresponding author
# (joint) last author

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