Low-temperature CO oxidation over new types of Sn-Pt/SiO2 catalysts

J. L. Margitfalvi, I. Borbáth, M. Hegedus, E. Tfirst, S. Gobölös, K. Lázár

Research output: Contribution to journalArticle

45 Citations (Scopus)

Abstract

Sn-Pt/SiO2 catalysts with different (at./at.) ratios were prepared using controlled surface reactions between tin tetraethyl and hydrogen adsorbed on platinum and were tested in the low-temperature oxidation of CO. The results indicated that alloy type Sn-Pt/SiO2 catalysts were highly active for low-temperature CO oxidation. The high activity of these catalysts can be attributed to the stabilization of tin-platinum alloy phases on the silica support, and the formation of ″Sn4+-Pt″ ensemble sites during CO oxidation. Sn4+ species formed in situ were involved in the activation of the CO molecule adsorbed at the neighboring Pt site. This activation strongly resembles that of the carbonyl group in unsaturated aldehydes over this type of Sn-Pt/SiO2 catalysts.

Original languageEnglish
Pages (from-to)200-204
Number of pages5
JournalJournal of Catalysis
Volume196
Issue number1
DOIs
Publication statusPublished - Nov 15 2000

Keywords

  • CO oxidation
  • Low-temperature oxidation
  • Mossbauer spectroscopy
  • Sn-Pt ensemble sites
  • Sn-Pt/SiO catalysts

ASJC Scopus subject areas

  • Catalysis
  • Physical and Theoretical Chemistry

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