CO oxidation on Pd(1 1 1), Pt(1 1 1), and Rh(1 1 1) surfaces studied by infrared chemiluminescence spectroscopy

Kenji Nakao, Osamu Watanabe, Toshiaki Sasaki, Shin ichi Ito, Keiichi Tomishige, Kimio Kunimori

Research output: Contribution to journalArticlepeer-review

17 Citations (Scopus)

Abstract

The infrared (IR) chemiluminescence studies of CO2 formed during steady-state CO oxidation over Pd(1 1 1), Pt(1 1 1), and Rh(1 1 1) surfaces were carried out. Analysis of their emission spectra indicates that the order of the average vibrational temperature (TVAV) values of CO2 formed during CO oxidation was as follows: Pd(1 1 1) > Pt(1 1 1) > Rh(1 1 1), and the order is coincident with the potential energy in the transition state expected by the theoretical calculations. Furthermore, it is suggested that the bending vibrational temperature (TVB) can also be influenced by the angle of O-C-O (∠OCO) of the activated complex in the transition state, which has also been proposed by the theoretical calculations.

Original languageEnglish
Pages (from-to)3796-3800
Number of pages5
JournalSurface Science
Volume601
Issue number18
DOIs
Publication statusPublished - 2007 Sep 15
Externally publishedYes

Keywords

  • CO oxidation
  • Carbon dioxide
  • Carbon monoxide
  • IR chemiluminescence
  • Noble metal

ASJC Scopus subject areas

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

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