✦ LIBER ✦

Parameter-dependent anisotropy of front propagation in the H2 + O2 reaction on Rh(110)

✍ Scribed by F. Mertens; R. Imbihl

Publisher: Elsevier Science
Year: 1995
Tongue: English
Weight: 586 KB
Volume: 242
Category: Article
ISSN: 0009-2614
DOI: 10.1016/0009-2614(95)00696-2

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✦ Synopsis

Front propagation in the H 2 + 0 2 reaction on Rh(ll0) has been studied for 480 < T < 780 K in the 10 -5 mbar range using photoemission electron microscopy as a spatially resolving method. Depending on the temperature and the hydrogen partial pressure (for fixed Po2) the anisotropy of front propagation was found to vary drastically from a front which was elliptical in the [ll0]-direction at high pu:/low T to a front which was elliptically deformed in the [001]-direction at low pH2/high T. The change in surface anisotropy is seemingly in contradiction with the anisotropy of the surface structures which are involved since these are all anisotropic in the [ll0]-direction.

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