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

F. Mertens; R. Imbihl

doi:10.1016/0039-6028(95)00994-9

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

F. Mertens, R. Imbihl^*

^*Corresponding author for this work

Institute of Physical Chemistry and Electrochemistry

Fritz Haber Institute of the Max Planck Society (FHI)

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

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 p_H2, T-parameter range for fixed p_NO = 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.

Original language	English
Pages (from-to)	355-366
Number of pages	12
Journal	Surface science
Volume	347
Issue number	3
DOIs	https://doi.org/10.1016/0039-6028(95)00994-9
Publication status	Published - 20 Feb 1996

Keywords

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

ASJC Scopus subject areas

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

Access to Document

10.1016/0039-6028(95)00994-9

Cite this

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

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",

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AU - Imbihl, R.

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KW - Nitrogen oxides

KW - Photoemission electron microscopy

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