Growth of Rh nanoclusters on TiO 2 (1 1 0): XPS and LEIS studies

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Abstract

Rhodium clusters were prepared by evaporation on a nearly stoichiometric TiO 2 (1 1 0) surface. The growth of metal nanoparticles, as a function of rhodium coverage, could be followed by monitoring the Rh 3d 5/2 XP peak position and by low energy ion scattering spectroscopy (LEIS). The substrate temperature in the 160-300 K regime during evaporation significantly influences the cluster size, leading to smaller crystallites at low temperature. Annealing the surface results in the agglomeration of rhodium, which commenced at lower temperature for smaller clusters. At high temperatures (∼900 K) encapsulation of rhodium also occurred.

Original languageEnglish
Pages (from-to)8624-8629
Number of pages6
JournalApplied Surface Science
Volume252
Issue number24
DOIs
Publication statusPublished - Oct 15 2006

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Keywords

  • Low energy ion scattering spectroscopy
  • Model catalysis
  • Rhodium nanoclusters
  • Titania
  • X-ray photoelectron spectroscopy

ASJC Scopus subject areas

  • Chemistry(all)
  • Condensed Matter Physics
  • Physics and Astronomy(all)
  • Surfaces and Interfaces
  • Surfaces, Coatings and Films

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