Surface electronic properties and CO hydrogenation activity of nickel deposited on rutile TiO2(100) as a model supported catalyst

Chia Chieh Kao*, Shou Chin Tsai, Yip Wah Chung

*Corresponding author for this work

Research output: Contribution to journalArticle

111 Scopus citations

Abstract

A combined ultrahigh-vacuum surface analysis-high-pressure cell system has been used to study the electronic properties and CO hydrogenation behavior of nickel deposited on single-crystal rutile TiO2(100) as a model supported catalyst. Photoemission studies show that nickel atoms at the Ni TiO2(100) interface are negatively charged. In situ CO hydrogenation studies at a total pressure of 80 Torr have been performed on Ni TiO2(100) and Ni(111) from 170 to 270 °C. The methane turnover number of Ni TiO2(100) is a function of the Ni coverage and attains a maximum at an average Ni thickness of 5 Å the methanation activity of 5 Å Ni TiO2 is a factor 3.3-3.7 times that of Ni(111), with an accompanying shift of the product distribution toward higher hydrocarbons.

Original languageEnglish (US)
Pages (from-to)136-146
Number of pages11
JournalJournal of Catalysis
Volume73
Issue number1
DOIs
StatePublished - Jan 1982

ASJC Scopus subject areas

  • Catalysis
  • Physical and Theoretical Chemistry

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