Nucleation of chemical waves at structural defects: A mirror electron microscopy study of catalytic CO oxidation on Pt(110)

Research output: Contribution to journalArticleResearchpeer review

Authors

  • K. C. Rose
  • R. Imbihl
  • B. Rausenberger
  • C. S. Rastomjee
  • W. Engel
  • A. M. Bradshaw

External Research Organisations

  • Fritz Haber Institute of the Max Planck Society (FHI)
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Details

Original languageEnglish
Pages (from-to)258-262
Number of pages5
JournalSurface science
Volume352-354
Publication statusPublished - 15 May 1996

Abstract

The formation of reaction fronts during the catalytic oxidation of CO on Pt(110) has been investigated with mirror electron microscopy (MEM). The reaction was studied in the 10-5 mbar range at T ≈ 430-450 K under conditions where spatio-temporal pattern formation occurs. Nucleation of reaction fronts was always found to take place at surface defects. While the CO front nucleates as a circular spot, the oxygen front first spreads out very rapidly along the [110] direction. Often, the reaction fronts fail to propagate away entirely from the defects, and instead a kind of breathing mode is observed. Rotating spiral waves can be identified, the cores of which are not attached to structural defects, but meander freely.

Keywords

    Carbon monoxide, Catalysis, Low index single crystal surfaces, Low-energy electron microscopy (LEEM), Models of non-linear phenomena, Oxygen, Platinum, Surface chemical reaction

ASJC Scopus subject areas

Cite this

Nucleation of chemical waves at structural defects: A mirror electron microscopy study of catalytic CO oxidation on Pt(110). / Rose, K. C.; Imbihl, R.; Rausenberger, B. et al.
In: Surface science, Vol. 352-354, 15.05.1996, p. 258-262.

Research output: Contribution to journalArticleResearchpeer review

Rose KC, Imbihl R, Rausenberger B, Rastomjee CS, Engel W, Bradshaw AM. Nucleation of chemical waves at structural defects: A mirror electron microscopy study of catalytic CO oxidation on Pt(110). Surface science. 1996 May 15;352-354:258-262. doi: 10.1016/0039-6028(95)01143-9
Rose, K. C. ; Imbihl, R. ; Rausenberger, B. et al. / Nucleation of chemical waves at structural defects : A mirror electron microscopy study of catalytic CO oxidation on Pt(110). In: Surface science. 1996 ; Vol. 352-354. pp. 258-262.
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abstract = "The formation of reaction fronts during the catalytic oxidation of CO on Pt(110) has been investigated with mirror electron microscopy (MEM). The reaction was studied in the 10-5 mbar range at T ≈ 430-450 K under conditions where spatio-temporal pattern formation occurs. Nucleation of reaction fronts was always found to take place at surface defects. While the CO front nucleates as a circular spot, the oxygen front first spreads out very rapidly along the [110] direction. Often, the reaction fronts fail to propagate away entirely from the defects, and instead a kind of breathing mode is observed. Rotating spiral waves can be identified, the cores of which are not attached to structural defects, but meander freely.",
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T2 - A mirror electron microscopy study of catalytic CO oxidation on Pt(110)

AU - Rose, K. C.

AU - Imbihl, R.

AU - Rausenberger, B.

AU - Rastomjee, C. S.

AU - Engel, W.

AU - Bradshaw, A. M.

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KW - Catalysis

KW - Low index single crystal surfaces

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