Preparation and characterization of bifunctional Pt-Sn/H[Al]ZSM5 catalysts

Bifunctional monometallic Pt/H[Al]ZSM5, Sn/H[Al]ZSM5 and bimetallic Pt-Sn/H[Al]ZSM5 (tin atomic fraction, XSn, of 0.46) catalysts were prepared and characterized by means of XPS, EPR, TEM and toluene hydrogenation. The species on their surface as well as the presence of an effect of the electronic a...

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Bibliographic Details
Published in:Catalysis letters 2003-07, Vol.89 (1-2), p.99-104
Main Authors: MORALES, Ricardo, MELO, Luis, LLANOS, Aura, BRITO, Joaquin, DIAZ, Yraida, ALBORNOZ, Luis, MORONTA, Delfin
Format: Article
Language:English
Subjects:
Aluminum
Bimetals
Catalysis
Catalysts
Catalysts: preparations and properties
Chemistry
Exact sciences and technology
General and physical chemistry
Hydrogenation
Ion-exchange
Surface physical chemistry
Theory of reactions, general kinetics. Catalysis. Nomenclature, chemical documentation, computer chemistry
Tin
Toluene
Zeolites: preparations and properties
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Summary:Bifunctional monometallic Pt/H[Al]ZSM5, Sn/H[Al]ZSM5 and bimetallic Pt-Sn/H[Al]ZSM5 (tin atomic fraction, XSn, of 0.46) catalysts were prepared and characterized by means of XPS, EPR, TEM and toluene hydrogenation. The species on their surface as well as the presence of an effect of the electronic and/or geometric type between Pt and Sn in the bimetallic catalyst, which would result in the existence of reduced tin species (Sn0 and/or Sn-Pt), were determined. These species were determined through XPS and would explain the decrease in the hydrogenating activity in the toluene hydrogenation reaction.
ISSN:1011-372X
1572-879X
DOI:10.1023/A:1024779712066