Unusual behaviour of chemical waves in the NO + H2 reaction on Rh(111): Long-range diffusion and formation of patches with reduced work function

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

Authors

  • N. M.H. Janssen
  • A. Schaak
  • B. E. Nieuwenhuys
  • R. Imbihl

Research Organisations

External Research Organisations

  • Leiden University
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Details

Original languageEnglish
Pages (from-to)L555-L562
JournalSurface science
Volume364
Issue number2
Publication statusPublished - 20 Aug 1996

Abstract

Pattern formation in the NO+ H2 reaction on Rh(111) has been investigated in the 10-6 mbar range using photoelectron emission microscopy (PEEM) as a spatially resolving method. Target patterns, spiral waves and irregular patterns are observed in a T-window of ∼ 20 K width at around 460 K, located in the transition range between the reactive and unreactive states of the surface. A new species characterized by a work function below that of the clean surface forms upon collision of two wave fronts. This new species is tentatively assigned to subsurface oxygen. The colliding wave fronts start to interact when they are still more than 100 μm apart, thus demonstrating the presence of a long-range diffusional coupling.

Keywords

    Electron microscopy, Hydrogen, Nitrogen oxides, Rhodium, Surface chemical reaction

ASJC Scopus subject areas

Cite this

Unusual behaviour of chemical waves in the NO + H2 reaction on Rh(111): Long-range diffusion and formation of patches with reduced work function. / Janssen, N. M.H.; Schaak, A.; Nieuwenhuys, B. E. et al.
In: Surface science, Vol. 364, No. 2, 20.08.1996, p. L555-L562.

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

Janssen NMH, Schaak A, Nieuwenhuys BE, Imbihl R. Unusual behaviour of chemical waves in the NO + H2 reaction on Rh(111): Long-range diffusion and formation of patches with reduced work function. Surface science. 1996 Aug 20;364(2):L555-L562. doi: 10.1016/0039-6028(96)00793-5
Janssen, N. M.H. ; Schaak, A. ; Nieuwenhuys, B. E. et al. / Unusual behaviour of chemical waves in the NO + H2 reaction on Rh(111) : Long-range diffusion and formation of patches with reduced work function. In: Surface science. 1996 ; Vol. 364, No. 2. pp. L555-L562.
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T2 - Long-range diffusion and formation of patches with reduced work function

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AU - Schaak, A.

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