Effect of high temperature reduction on the surface composition of and CO chemisorption on Ni/TiO2

S. Takatani*, Y. W. Chung

*Corresponding author for this work

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Abstract

Surface composition of and CO chemisorption on a partially oxidized titanium foil covered with 120 Å of nickel was examined by Auger electron spectroscopy (AES) after various amounts of hydrogen reduction at 700 K. AES and sputter-profiling showed the segregation of submonolayer amounts of reduced titanium oxide on the nickel surface after 10-40 min of hydrogen reduction at 700 K. The maximum CO uptake at room temperature was reduced to 30-40% of the pre-reduction value after 30 min of hydrogen reduction. These observations suggest that the commonly reported phenomenon of strong metal-support interaction (SMSI) is a result of partial coverage of the metal catalyst surface by titanium oxide.

Original languageEnglish (US)
Pages (from-to)341-347
Number of pages7
JournalApplications of Surface Science
Volume19
Issue number1-4
DOIs
StatePublished - Nov 1984

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ASJC Scopus subject areas

  • Engineering(all)

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