Control of the shape of chemical wave patterns in the NO + H2 reaction on Rh(110) by adsorbate-induced reconstructions

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Authors

  • F. Mertens
  • R. Imbihl

Research Organisations

External Research Organisations

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

Original languageEnglish
Pages (from-to)355-366
Number of pages12
JournalSurface science
Volume347
Issue number3
Publication statusPublished - 20 Feb 1996

Abstract

The NO+H2 reaction on Rh(110) has been investigated between 480 and 650 K under isothermal low-pressure conditions at 10-6 and 10-5 mbar. Photoemission electron microscopy (PEEM) was used as a spatially resolving method. Depending on the experimental parameters, a variety of different chemical wave patterns such as elliptically and rectangularly shaped target patterns or travelling wave fragments were found. The existence range of these patterns has been mapped out in the pH2, T-parameter range for fixed pNO = 1.6 × 10-6 mbar. In low energy electron diffraction (LEED) a number of different nitrogen and oxygen induced reconstructions was observed in the pattern-forming parameter range. The variations in the shape of the wave patterns were traced to the presence of adsorbate-induced reconstructions with different anisotropy caused by atomic oxygen and atomic nitrogen, respectively.

Keywords

    Low energy electron diffraction (LEED), Low index single crystal surfaces, Nitrogen oxides, Photoemission electron microscopy, Rhodium, Surface chemical reaction

ASJC Scopus subject areas

Cite this

Control of the shape of chemical wave patterns in the NO + H2 reaction on Rh(110) by adsorbate-induced reconstructions. / Mertens, F.; Imbihl, R.
In: Surface science, Vol. 347, No. 3, 20.02.1996, p. 355-366.

Research output: Contribution to journal › Article › Research › peer review

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AU - Imbihl, R.

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