دورية أكاديمية
Reactivity and Stability of Ultrathin VOx Films on Pt(111) in Catalytic Methanol Oxidation
| العنوان: | Reactivity and Stability of Ultrathin VOx Films on Pt(111) in Catalytic Methanol Oxidation |
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| المؤلفون: | von Boehn, Bernhard, Scholtz, Lena, Imbihl, Ronald |
| المصدر: | Topics in Catalysis 63 (2020) |
| بيانات النشر: | Springer Science + Business Media |
| سنة النشر: | 2020 |
| المجموعة: | Institutional Repository of Leibniz Universität Hannover |
| مصطلحات موضوعية: | Methanol oxidation, Pt(111), Stranski–Krastanow growth, Supported catalyst, vanadium oxide catalysts, Auger electron spectroscopy, Catalytic oxidation, Electrons, Methanol, Monolayers, Oxidation, Platinum compounds, Ultrathin films, Photoemission electron microscopy, Rate measurements, Reaction conditions, Reactive deposition, Spatial homogeneity, Subsurface regions, Ultrathin layers, Vanadium compounds, ddc:540 |
| الوصف: | The growth of ultrathin layers of VOx (< 12 monolayers) on Pt(111) and the activity of these layers in catalytic methanol oxidation at 10−4 mbar have been studied with low-energy electron diffraction, Auger electron spectroscopy, rate measurements, and with photoemission electron microscopy. Reactive deposition of V in O2 at 670 K obeys a Stranski–Krastanov growth mode with a (√3 × √3)R30° structure representing the limiting case for epitaxial growth of 3D-VOx. The activity of VOx/Pt(111) in catalytic methanol oxidation is very low and no redistribution dynamics is observed lifting the initial spatial homogeneity of the VOx layer. Under reaction conditions, part of the surface vanadium diffuses into the Pt subsurface region. Exposure to O2 causes part of the V to diffuse back to the surface, but only up to one monolayer of VOx can be stabilized in this way at 10−4 mbar. |
| نوع الوثيقة: | article in journal/newspaper |
| اللغة: | English |
| تدمد: | 1022-5528 |
| العلاقة: | ESSN:1572-9028; http://dx.doi.org/10.15488/10787Test; https://www.repo.uni-hannover.de/handle/123456789/10865Test |
| DOI: | 10.15488/10787 |
| الإتاحة: | https://doi.org/10.15488/10787Test https://doi.org/10.1007/s11244-020-01321-zTest https://www.repo.uni-hannover.de/handle/123456789/10865Test |
| حقوق: | CC BY 4.0 Unported ; https://creativecommons.org/licenses/by/4.0Test/ ; frei zugänglich |
| رقم الانضمام: | edsbas.B04BDAC1 |
| قاعدة البيانات: | BASE |
| تدمد: | 10225528 |
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| DOI: | 10.15488/10787 |