Details
| Original language | English |
|---|---|
| Article number | 045117 |
| Journal | CHAOS |
| Volume | 28 |
| Issue number | 4 |
| Early online date | 17 Apr 2018 |
| Publication status | Published - Apr 2018 |
Abstract
Various oxidation reactions with NO as oxidant have been investigated on a partially VOx covered Rh(111) surface (θV = 0.3 MLE) in the 10-4 mbar range, using photoelectron emission microscopy (PEEM) as spatially resolving method. The PEEM studies are complemented by rate measurements and by low-energy electron diffraction. In catalytic methanol oxidation with NO and in the NH3 + NO reaction, we observe that starting from a homogeneous surface with increasing temperature first a stripe pattern develops, followed by a pattern in which macroscopic holes of nearly bare metal surface are surrounded by a VOx film. These hole patterns represent just the inverse of the VOx distribution patterns seen if O2 instead of NO is used as oxidant.
ASJC Scopus subject areas
- Physics and Astronomy(all)
- Statistical and Nonlinear Physics
- Mathematics(all)
- Mathematical Physics
- Physics and Astronomy(all)
- General Physics and Astronomy
- Mathematics(all)
- Applied Mathematics
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In: CHAOS, Vol. 28, No. 4, 045117, 04.2018.
Research output: Contribution to journal › Article › Research › peer review
}
TY - JOUR
T1 - Hole patterns in ultrathin vanadium oxide layers on a Rh(111) surface during catalytic oxidation reactions with NO
AU - Von Boehn, Bernhard
AU - Mehrwald, Sarah
AU - Imbihl, Ronald
N1 - Publisher Copyright: © 2018 Author(s). Copyright: Copyright 2018 Elsevier B.V., All rights reserved.
PY - 2018/4
Y1 - 2018/4
N2 - Various oxidation reactions with NO as oxidant have been investigated on a partially VOx covered Rh(111) surface (θV = 0.3 MLE) in the 10-4 mbar range, using photoelectron emission microscopy (PEEM) as spatially resolving method. The PEEM studies are complemented by rate measurements and by low-energy electron diffraction. In catalytic methanol oxidation with NO and in the NH3 + NO reaction, we observe that starting from a homogeneous surface with increasing temperature first a stripe pattern develops, followed by a pattern in which macroscopic holes of nearly bare metal surface are surrounded by a VOx film. These hole patterns represent just the inverse of the VOx distribution patterns seen if O2 instead of NO is used as oxidant.
AB - Various oxidation reactions with NO as oxidant have been investigated on a partially VOx covered Rh(111) surface (θV = 0.3 MLE) in the 10-4 mbar range, using photoelectron emission microscopy (PEEM) as spatially resolving method. The PEEM studies are complemented by rate measurements and by low-energy electron diffraction. In catalytic methanol oxidation with NO and in the NH3 + NO reaction, we observe that starting from a homogeneous surface with increasing temperature first a stripe pattern develops, followed by a pattern in which macroscopic holes of nearly bare metal surface are surrounded by a VOx film. These hole patterns represent just the inverse of the VOx distribution patterns seen if O2 instead of NO is used as oxidant.
UR - http://www.scopus.com/inward/record.url?scp=85045854032&partnerID=8YFLogxK
U2 - 10.1063/1.5020360
DO - 10.1063/1.5020360
M3 - Article
AN - SCOPUS:85045854032
VL - 28
JO - CHAOS
JF - CHAOS
SN - 1054-1500
IS - 4
M1 - 045117
ER -