In-situ study of the catalytic oxidation of CO on a Pt(1 1 0) surface using ambient pressure X-ray photoelectron spectroscopy

Jen Yang Chung, Funda Aksoy, Michael E. Grass, Hiroshi Kondoh, Phil Ross, Zhi Liu, Bongjin Simon Mun

Research output: Contribution to journalArticle

28 Citations (Scopus)

Abstract

CO and O2 co-adsorption and the catalytic oxidation of CO on a Pt(1 1 0) surface under various pressures of CO and O2 (up to 250 mTorr) are studied using ambient pressure X-ray photoelectron spectroscopy (APXPS) and mass spectrometry. There is no surface oxide formation on Pt under our reaction conditions. CO oxidation in this pressure (<500 mTorr), O2 to CO ratio (<10), and temperature (150 °C) regime is consistent with the Langmuir-Hinshelwood reaction mechanism. Our findings provide in-situ surface chemical composition data of the catalytic oxidation of CO on Pt(1 1 0) at total pressures below 1 Torr.

Original languageEnglish
Pages (from-to)L35-L38
JournalSurface Science
Volume603
Issue number5
DOIs
Publication statusPublished - 2009 Mar 1

Keywords

  • Ambient pressure X-ray photoemission spectroscopy
  • CO oxidation
  • Pt(1 1 0)

ASJC Scopus subject areas

  • Condensed Matter Physics
  • Surfaces and Interfaces
  • Surfaces, Coatings and Films
  • Materials Chemistry

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