Chemical Wave Patterns and Oxide Redistribution during Methanol Oxidation on a V-Oxide Promoted Rh(110) Surface

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

Autoren

  • Bernhard Von Boehn
  • Ronald Imbihl

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OriginalspracheEnglisch
Seiten (von - bis)12694-12703
Seitenumfang10
FachzeitschriftJournal of Physical Chemistry C
Jahrgang122
Ausgabenummer24
Frühes Online-Datum9 März 2018
PublikationsstatusVeröffentlicht - 21 Juni 2018

Abstract

Chemical wave patterns and the formation of macroscopic vanadium oxide islands have been investigated in the 10-4 mbar range during catalytic methanol oxidation on ultrathin VOx films (θV ≤ 1 monolayer equivalent) supported on Rh(110). At temperatures around 800 K, wave fragments traveling along the [110] direction and oxidation/reduction fronts exhibiting different front geometries are observed with photoemission electron microscopy. At ≈1000 K, a redistribution of VOx leads to the growth of macroscopic oxide islands under reaction conditions. On these macroscopic V-oxide islands chemical waves including traveling wave fragments propagate. Under conditions close to equistability of oxidized and reduced phase, a dendritic growth of the V-oxide islands is observed. In contrast to Rh(111)/VOx, almost no catalytic activity in formaldehyde production is found on Rh(110)/VOx.

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Chemical Wave Patterns and Oxide Redistribution during Methanol Oxidation on a V-Oxide Promoted Rh(110) Surface. / Von Boehn, Bernhard; Imbihl, Ronald.
in: Journal of Physical Chemistry C, Jahrgang 122, Nr. 24, 21.06.2018, S. 12694-12703.

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

Von Boehn B, Imbihl R. Chemical Wave Patterns and Oxide Redistribution during Methanol Oxidation on a V-Oxide Promoted Rh(110) Surface. Journal of Physical Chemistry C. 2018 Jun 21;122(24):12694-12703. Epub 2018 Mär 9. doi: 10.1021/acs.jpcc.8b00852
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AU - Imbihl, Ronald

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