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

• Published in: Catalysis letters Vol. 89; no. 1-2; pp. 99 - 104
• Main Authors: MORALES, Ricardo, MELO, Luis, LLANOS, Aura, BRITO, Joaquin, DIAZ, Yraida, ALBORNOZ, Luis, MORONTA, Delfin
• Format: Journal Article
• Language: English
• Published: Dordrecht Springer 01-07-2003; Springer Nature B.V
• 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; Bifunctional catalyst; EPR; Pt-Sn/H[Al]ZSM5 catalysts characterization; EPR spectrometry; X ray; Zeolite; Molecular sieve; Characterization; toluene hydrogenation; Heterogeneous catalysis; Transmission electron microscopy; Platinum; Preparation; Tin; Photoelectron spectrometry; XPS; TEM; Catalyst
• ISSN: 1011-372X; 1572-879X
• DOI: 10.1023/A:1024779712066

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.