Dehydrogenation of cyclohexene on platinum nanoclusters on a thin film of Al2O3/NiAl(100)

Shrikrishina D. Sartale, Huang Wei Shiu, Wen Hua Wen, Meng Fan Luo, Y. C. Lin, Yao Jane Hsu

Research output: Contribution to journalArticlepeer-review

7 Scopus citations

Abstract

Using a scanning-tunneling microscope, reflection high-energy electron diffraction and photoelectron spectra with synchrotron radiation, we investigated the temperature dependence of the dehydrogenation of cyclohexene (C6H10) adsorbed on Pt nanoclusters supported on an ultra-thin film of Al2O3/NiAl(100). The Pt clusters, grown by vapor deposition, are structurally ordered and exhibit a mean diameter 2.2 nm and height 0.4 nm. The progress of dehydrogenation was monitored through the temporal variation of C 1s photoelectron spectra; analysis of these features revealed that the dehydrogenation of cyclohexene with increasing sample temperature occurs as a sequential process beginning around 150 K, a temperature significantly less than that for Pt single-crystal surfaces. The dehydrogenation behavior, particularly the decomposition into elemental carbon, is found to vary with Pt coverage.

Original languageEnglish
Pages (from-to)95-100
Number of pages6
JournalCatalysis Letters
Volume119
Issue number1-2
DOIs
StatePublished - Nov 2007

Keywords

  • Cyclohexene
  • Dehydrogenation
  • Nanocluster
  • PES
  • Pt
  • STM

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