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

Research output: Contribution to journalArticlepeer-review

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

Funding

Acknowledgments This work was supported by the Division of Materials Sciences, Office of Basic Energy Sciences, U. S. Department of Energy. The use of the Central Facilities of Northwestern University's Materials Research Center, supported under the NSF-MRL program, f a c i l i t a t e d t h i s work.

ASJC Scopus subject areas

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

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