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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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Gardini, Diego
in Cooperation with on an Cooperation-Score of 37%
Topics
Publications (4/4 displayed)
- 2014Intermetallic compounds of Ni and Ga as catalysts for the synthesis of methanolcitations
- 2014Intermetallic compounds of Ni and Ga as catalysts for the synthesis of methanolcitations
- 2014Electron microscopy study of the deactivation of nickel based catalysts for bio oil hydrodeoxygenation
- 2012Origin of low temperature deactivation of Ni5Ga3 nanoparticles as catalyst for methanol synthesis
Places of action
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article
Intermetallic compounds of Ni and Ga as catalysts for the synthesis of methanol
Abstract
In this work, we present a detailed study of the formation of supported intermetallic Ni–Ga catalysts for CO<sub>2</sub> hydrogenation to methanol. The bimetallic phase is formed during a temperature-programmed reduction of the metal nitrates. By utilizing a combination of characterization techniques, in particular in situ and ex situ X-ray diffraction, in situ X-ray absorption spectroscopy, transmission electron microscopy combined with electron energy loss spectroscopy and X-ray fluorescence, we have studied the formation of intermetallic Ni–Ga catalysts of two compositions: NiGa and Ni<sub>5</sub>Ga<sub>3</sub>. These methods demonstrate that the catalysts with the desired intermetallic phase and composition are formed upon reduction in hydrogen and enable us to propose a mechanism of the Ni–Ga nanoparticles formation. By studying the effect of calcination prior to catalyst reduction, we show that the reactivity depends on particle size, which suggests that the reaction is structure sensitive.