Details
| Original language | English |
|---|---|
| Pages (from-to) | 19101-19112 |
| Number of pages | 12 |
| Journal | Journal of Physical Chemistry C |
| Volume | 126 |
| Issue number | 45 |
| Early online date | 7 Nov 2022 |
| Publication status | Published - 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 subject areas
- Materials Science(all)
- Electronic, Optical and Magnetic Materials
- Energy(all)
- Chemistry(all)
- Physical and Theoretical Chemistry
- Materials Science(all)
- Surfaces, Coatings and Films
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In: Journal of Physical Chemistry C, Vol. 126, No. 45, 17.11.2022, p. 19101-19112.
Research output: Contribution to journal › Article › Research › peer review
}
TY - JOUR
T1 - Phase Separation within Vanadium Oxide Islands under Reaction Conditions
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.
PY - 2022/11/17
Y1 - 2022/11/17
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.
AB - 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.
UR - http://www.scopus.com/inward/record.url?scp=85141687140&partnerID=8YFLogxK
U2 - 10.1021/acs.jpcc.2c04174
DO - 10.1021/acs.jpcc.2c04174
M3 - Article
AN - SCOPUS:85141687140
VL - 126
SP - 19101
EP - 19112
JO - Journal of Physical Chemistry C
JF - Journal of Physical Chemistry C
SN - 1932-7447
IS - 45
ER -