Triangular-shaped reaction fronts in a catalytic surface reaction

Publikation: Beitrag in Fachzeitschrift › Artikel › Forschung › Peer-Review

Autoren

  • A. Schaak
  • R. Imbihl

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OriginalspracheEnglisch
Seiten (von - bis)386-390
Seitenumfang5
FachzeitschriftChemical physics letters
Jahrgang283
Ausgabenummer5-6
PublikationsstatusVeröffentlicht - 13 Feb. 1998

Abstract

The reaction between oxygen adsorbed on a Rh(111) surface and hydrogen has been investigated in titration experiments at low pressure (p<10-5 mbar) using photoemisson electron microscopy (PEEM) as spatially resolving method. The reactive removal of the (8×8)-O structure proceeds via a hole-eating mechanism. The shape and velocity of the front depends on the parameter p(H2), temperature and the exposure time to oxygen. At very high O2 exposures (≈106 L) triangular reaction fronts are seen oriented parallel to close-packed rows of the (111) surface. The anisotropic front propagation on the isotropic Rh(111) surface is attributed to elastic stress at the interface between surface phases with different periodicities.

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Triangular-shaped reaction fronts in a catalytic surface reaction. / Schaak, A.; Imbihl, R.
in: Chemical physics letters, Jahrgang 283, Nr. 5-6, 13.02.1998, S. 386-390.

Publikation: Beitrag in Fachzeitschrift › Artikel › Forschung › Peer-Review

Schaak A, Imbihl R. Triangular-shaped reaction fronts in a catalytic surface reaction. Chemical physics letters. 1998 Feb 13;283(5-6):386-390. doi: 10.1016/S0009-2614(97)01402-4
Schaak, A. ; Imbihl, R. / Triangular-shaped reaction fronts in a catalytic surface reaction. in: Chemical physics letters. 1998 ; Jahrgang 283, Nr. 5-6. S. 386-390.
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