| People | Locations | Statistics |
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| Naji, M. |
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| Motta, Antonella |
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| Aletan, Dirar |
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| Mohamed, Tarek |
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| Ertürk, Emre |
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| Taccardi, Nicola |
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| Kononenko, Denys |
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| Petrov, R. H. | Madrid |
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| Alshaaer, Mazen | Brussels |
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| Bih, L. |
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| Casati, R. |
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| Muller, Hermance |
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| Kočí, Jan | Prague |
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| Šuljagić, Marija |
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| Kalteremidou, Kalliopi-Artemi | Brussels |
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| Azam, Siraj |
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| Ospanova, Alyiya |
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| Blanpain, Bart |
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| Ali, M. A. |
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| Popa, V. |
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| Rančić, M. |
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| Ollier, Nadège |
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| Azevedo, Nuno Monteiro |
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| Landes, Michael |
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| Rignanese, Gian-Marco |
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Fiordaliso, Elisabetta Maria
in Cooperation with on an Cooperation-Score of 37%
Topics
Publications (11/11 displayed)
- 2022Doping Profiles in Ultrathin Vertical VLS-Grown InAs Nanowire MOSFETs with High Performance.
- 2021Doping Profiles in Ultrathin Vertical VLS-Grown InAs Nanowire MOSFETs with High Performancecitations
- 2020Effect of Cold Sintering Process (CSP) on the Electro-Chemo-Mechanical Properties of Gd-doped Ceria (GDC)citations
- 2020Shadow Epitaxy for In Situ Growth of Generic Semiconductor/Superconductor Hybridscitations
- 2019Evolution of intermetallic GaPd2/SiO2 catalyst and optimization for methanol synthesis at ambient pressurecitations
- 2015Intermetallic GaPd2 Nanoparticles on SiO2 for Low-Pressure CO2 Hydrogenation to Methanolcitations
- 2015Intermetallic GaPd 2 Nanoparticles on SiO 2 for Low-Pressure CO 2 Hydrogenation to Methanol:Catalytic Performance and In Situ Characterizationcitations
- 2012H2 splitting on Pt, Ru and Rh nanoparticles supported on sputtered HOPGcitations
- 2012Size dependent reactivity of metal nanoparticles and alloys supported on HOPG, probed by the H-D exchange and the NH3 decomposition reactions
- 2012Strong Metal Support Interaction of Pt and Ru Nanoparticles Deposited on HOPG Probed by the H-D Exchange Reactioncitations
- 2011H2-splitting on Pt/Ru alloys supported on sputtered HOPGcitations
Places of action
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article
Strong Metal Support Interaction of Pt and Ru Nanoparticles Deposited on HOPG Probed by the H-D Exchange Reaction
Abstract
The interaction between metals and support is investigated in the case of 50 Å Pt and 50 Å Ru films deposited on a HOPG substrate. The films are prepared by electron beam physical vapor deposition and annealed in UHV to temperatures up to 700 °C. The equilibrium hydrogen exchange rate between adsorbed and gas phase at 1 bar is measured before and after annealing. The rate is measured in the temperature range of 40–200 °C at 1 bar, by utilization of the H-D exchange reaction. Experiments are performed on fresh cleaved and sputtered HOPG, which give similar results. We find that annealing the films from 150 up to 700 °C increases the amount of carbon present in the films up to 95%, as derived by surface analysis, indicating the formation of a carbon layer on top of the metal films. The exchange rate decreases dramatically with increasing carbon content on the films for both metals, pointing to a decrease in the hydrogen adsorption on the films, due to the carbon poisoning. We show how to reverse this effect by performing He+ sputtering, which enables to remove the carbon layer and regenerate the Pt catalysts. ISS spectra show that the Pt signal increases to around 95% of its initial value and we measure an exchange rate at 200 °C comparable to the value measured before annealing.