Improvement in stability and regenerability of silica supported platinum-tin catalysts prepared by surface organometallic chemistry. Effect of the tin addition process

J. P. Candy*, F. Humblot, B. Didillon, F. Lepeltier, J. M. Basset

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

3 Scopus citations

Abstract

Addition of tin by the organometallic route modifies strongly the stability and regenerability of pure Pt/ SiU2 in the reaction of isobutane dehydrogenation to isobutene. Two routes were used : in the first one, tetra n-butyl reacted on the surface of silica supported platinum particles, leading to surface PtSn alloys of different composition. In the second route, tetra n-butyl tin reacted first on the silica surface, to form (=SiO)2-Snn species ; then, platinum particles were generated on the modified silica surface. The stability of these two kinds of bimetallic catalysts has been studied during the oxidation-reduction processes used to regenerate the catalysts. The modification of the structure and texture of the solids was followed by electron microscopy (CTEM and EDAX), or oxygen and hydrogen chemisorption.

Original languageEnglish (US)
Pages (from-to)237-247
Number of pages11
JournalStudies in Surface Science and Catalysis
Volume126
StatePublished - 1999
Externally publishedYes

ASJC Scopus subject areas

  • Catalysis
  • Condensed Matter Physics
  • Surfaces, Coatings and Films
  • Physical and Theoretical Chemistry
  • Materials Chemistry

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