Phase Separation within Vanadium Oxide Islands under Reaction Conditions: Methanol Oxidation at Vanadium Oxide Films on Rh(111)

Publikation: Beitrag in FachzeitschriftArtikelForschungPeer-Review

Autoren

  • Bernhard von Boehn
  • Anton Weißbach
  • Jon-Olaf Krisponeit
  • Jan Ingo Flege
  • Jens Falta
  • Luca Gregoratti
  • Matteo Amati
  • Patrick Zeller
  • Ronald Imbihl

Externe Organisationen

  • Universität Bremen
  • Brandenburgische Technische Universität Cottbus - Senftenberg (BTU)
  • Sincrotrone Trieste
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Details

OriginalspracheEnglisch
Seiten (von - bis)19101-19112
Seitenumfang12
FachzeitschriftJournal of Physical Chemistry C
Jahrgang126
Ausgabenummer45
Frühes Online-Datum7 Nov. 2022
PublikationsstatusVeröffentlicht - 17 Nov. 2022

Abstract

Submonolayer coverages of V-oxide on Rh(111) condense during catalytic methanol oxidation into a pattern of macroscopic stripes or islands. Under reaction conditions, a phase separation occurs within the VOxislands that has been studied in a pressure range of 10-6-10-4mbar with photoemission electron microscopy (PEEM), low-energy electron microscopy (LEEM), microspot-low-energy electron diffraction (μLEED), and microspot-X-ray photoelectron spectroscopy (μXPS). An oxidized outer ring with a (√7 × √7)R19.1° structure coexists with an inner (12 × 12) Moiré-type boundary layer and a reduced core exhibiting a (√3 × √3)R30° Moiré type pattern. The dependence of the substructure on the reaction conditions, on V coverage, and on island size was investigated. With μXPS, the V coverages of the different phases in the VOxislands were determined.

ASJC Scopus Sachgebiete

Zitieren

Phase Separation within Vanadium Oxide Islands under Reaction Conditions: Methanol Oxidation at Vanadium Oxide Films on Rh(111). / von Boehn, Bernhard; Weißbach, Anton; Krisponeit, Jon-Olaf et al.
in: Journal of Physical Chemistry C, Jahrgang 126, Nr. 45, 17.11.2022, S. 19101-19112.

Publikation: Beitrag in FachzeitschriftArtikelForschungPeer-Review

von Boehn, B, Weißbach, A, Krisponeit, J-O, Flege, JI, Falta, J, Gregoratti, L, Amati, M, Zeller, P & Imbihl, R 2022, 'Phase Separation within Vanadium Oxide Islands under Reaction Conditions: Methanol Oxidation at Vanadium Oxide Films on Rh(111)', Journal of Physical Chemistry C, Jg. 126, Nr. 45, S. 19101-19112. https://doi.org/10.1021/acs.jpcc.2c04174
von Boehn, B., Weißbach, A., Krisponeit, J.-O., Flege, J. I., Falta, J., Gregoratti, L., Amati, M., Zeller, P., & Imbihl, R. (2022). Phase Separation within Vanadium Oxide Islands under Reaction Conditions: Methanol Oxidation at Vanadium Oxide Films on Rh(111). Journal of Physical Chemistry C, 126(45), 19101-19112. https://doi.org/10.1021/acs.jpcc.2c04174
von Boehn B, Weißbach A, Krisponeit JO, Flege JI, Falta J, Gregoratti L et al. Phase Separation within Vanadium Oxide Islands under Reaction Conditions: Methanol Oxidation at Vanadium Oxide Films on Rh(111). Journal of Physical Chemistry C. 2022 Nov 17;126(45):19101-19112. Epub 2022 Nov 7. doi: 10.1021/acs.jpcc.2c04174
von Boehn, Bernhard ; Weißbach, Anton ; Krisponeit, Jon-Olaf et al. / Phase Separation within Vanadium Oxide Islands under Reaction Conditions : Methanol Oxidation at Vanadium Oxide Films on Rh(111). in: Journal of Physical Chemistry C. 2022 ; Jahrgang 126, Nr. 45. S. 19101-19112.
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title = "Phase Separation within Vanadium Oxide Islands under Reaction Conditions: Methanol Oxidation at Vanadium Oxide Films on Rh(111)",
abstract = "Submonolayer coverages of V-oxide on Rh(111) condense during catalytic methanol oxidation into a pattern of macroscopic stripes or islands. Under reaction conditions, a phase separation occurs within the VOxislands that has been studied in a pressure range of 10-6-10-4mbar with photoemission electron microscopy (PEEM), low-energy electron microscopy (LEEM), microspot-low-energy electron diffraction (μLEED), and microspot-X-ray photoelectron spectroscopy (μXPS). An oxidized outer ring with a (√7 × √7)R19.1° structure coexists with an inner (12 × 12) Moir{\'e}-type boundary layer and a reduced core exhibiting a (√3 × √3)R30° Moir{\'e} type pattern. The dependence of the substructure on the reaction conditions, on V coverage, and on island size was investigated. With μXPS, the V coverages of the different phases in the VOxislands were determined.",
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T2 - Methanol Oxidation at Vanadium Oxide Films on Rh(111)

AU - von Boehn, Bernhard

AU - Weißbach, Anton

AU - Krisponeit, Jon-Olaf

AU - Flege, Jan Ingo

AU - Falta, Jens

AU - Gregoratti, Luca

AU - Amati, Matteo

AU - Zeller, Patrick

AU - Imbihl, Ronald

N1 - Funding Information: B.v.B. would like to thank the Department of Inorganic Chemistry of the Fritz Haber Institute of the Max Planck Society for financial support.

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N2 - Submonolayer coverages of V-oxide on Rh(111) condense during catalytic methanol oxidation into a pattern of macroscopic stripes or islands. Under reaction conditions, a phase separation occurs within the VOxislands that has been studied in a pressure range of 10-6-10-4mbar with photoemission electron microscopy (PEEM), low-energy electron microscopy (LEEM), microspot-low-energy electron diffraction (μLEED), and microspot-X-ray photoelectron spectroscopy (μXPS). An oxidized outer ring with a (√7 × √7)R19.1° structure coexists with an inner (12 × 12) Moiré-type boundary layer and a reduced core exhibiting a (√3 × √3)R30° Moiré type pattern. The dependence of the substructure on the reaction conditions, on V coverage, and on island size was investigated. With μXPS, the V coverages of the different phases in the VOxislands were determined.

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