Ceria as a new support of noble metal catalysts for hydrocarbon reactions: Chemisorption and catalytic studies

D. Teschner, A. Wootsch, T. Röder, K. Matusek, Z. Paál

Research output: Contribution to journalConference article

20 Citations (Scopus)

Abstract

Metal/cerium-oxide systems were practically not studied in hydrocarbon reactions. Chemisorption properties - in temperature programmed reduction, hydrogen adsorption, and H2/O2 titration - and catalytic behavior of ceria-supported Pt and Rh catalysts with different metal loadings and with two pre-reduction temperatures (LTR, TR = 573 K and HTR, TR = 773 K) were investigated. Pt/CeO2 was tested in transformation of n-hexane while Rh/CeO2 in ring opening of methylcyclopentane (MCP). Higher spillover activity was found for the LTR Rh samples than for HTR ones. The opposite was true for Pt. The Rh/ceria samples showed ordinary catalytic behavior: structure insensitivity was observed for the first C-C bond cleavage of MCP on Rh/ceria and the further reaction of the ring opening intermediates was affected by the surface hydrogen concentration. The Pt/LTR samples showed catalytic properties similar to EUROPT-1, while the HTR samples were different, namely the higher spillover activity caused high C5-cyclization selectivity on the catalyst with low metal loading, and surprisingly high hydrogenolysis selectivity on that with higher metal loading.

Original languageEnglish
Pages (from-to)709-713
Number of pages5
JournalSolid State Ionics
Volume141-142
DOIs
Publication statusPublished - May 1 2001
Event14th Intenational Symposium on the Reactivity of Solids - Budapest, Hungary
Duration: Aug 27 2000Aug 31 2000

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Keywords

  • Ceria
  • Ceria (CeO)
  • Chemical compounds
  • Hydrocarbon reactions
  • Platinum
  • Pt/ceria
  • Rh/ceria
  • Rhodium
  • Spillover

ASJC Scopus subject areas

  • Chemistry(all)
  • Materials Science(all)
  • Condensed Matter Physics

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