Site-switching for CO2 formation and structural transformation of (1×2)⇄(1×1) in steady-state CO oxidation on Pt (1 1 0)

Md Golam Moula, Asht B.P. Mishra, Izabela Rzeźnicka, Mikhail U. Kislyuk, Suwen Liu, Yuichi Ohno, Tatsuo Matsushima

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The angular and velocity distributions of desorbing product CO2 were studied in steady-state CO oxidation on Pt(110) by means of cross-correlation time-of-flight techniques. In the active region where the reaction was first order in CO, the angular distribution in the (001) plane was split into two-directional lobes collimated at ±25° from the surface-normal direction, indicating the CO2 formation on inclined (111) terraces. The translational temperature was maximized at these collimation angles, reaching about 1820 K. On the other hand, in a limited range of the inhibited region, where CO retarded the reaction, CO2 desorption sharply collimated along the surface-normal direction, suggesting CO2 formation on flat (1×1) domains.

Original languageEnglish
Pages (from-to)225-231
Number of pages7
JournalChemical Physics Letters
Issue number3-4
Publication statusPublished - 2001 Jun 22


ASJC Scopus subject areas

  • Physics and Astronomy(all)
  • Physical and Theoretical Chemistry

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