CO Chemisorption and H2/D2 Isotope Effect on the CO Hydrogénation Reaction on Ni(111) and Ni/TiO2 (100)

Chia Chieh Kao, Shou Chin Tsai, Yip Wan Chung

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2 Scopus citations

Abstract

A TiO2 (100) single crystal surface covered with 5Å Ni was used as a model supported catalyst to study effects of strong metal-support interaction(SMSI) on CO chemisorption and the CO hydrogenation reaction. Auger and C Is peak height measurements showed that CO chemisorption on Ni/TiO2 (100) is suppressed by 2.5 times compared to that on Ni(111). In situ CO hydrogenation studies o showed that the specific methanation activity from 5Å Ni/TiO2 (100) is ∼3.0–3.5 times that from Ni (111). No H2/D2 isotope effect was found for methane production on both Ni(111) and Ni/TiO2 (100), while the higher molecular weight product formation showed an inverse isotope effect on Ni(111) and a normal isotope effect on Ni/TiO2 (100). A qualitative explanation was proposed to account for the SMSI and the isotope effects.

Original languageEnglish (US)
Pages (from-to)211-218
Number of pages8
JournalStudies in Surface Science and Catalysis
Volume11
Issue numberC
DOIs
StatePublished - Jan 1 1982

ASJC Scopus subject areas

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

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