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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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Van Santen, Rutger
in Cooperation with on an Cooperation-Score of 37%
Topics
Publications (16/16 displayed)
- 2011DFT studies of hydrogen storage properties of Mg0.75Ti0.25citations
- 2010Nanostructures of Mg0.65Ti0.35Dx studied with X-ray diffraction, neutron diffraction and magic-angle-spinning 2H NMR spectroscopycitations
- 2010Reactivity and selectivity of heterogenized homogeneous catalysts: insights from molecular simulationscitations
- 2009Nanorod calculations on body-centered cubic iron : a method for estimation of size-dependent surface energies of metal nanocrystalscitations
- 2008CO Dissociation on the Ru(1121) Surfacecitations
- 2007Enantioselectivity of immobilized Mn-salen complexes : a computational studycitations
- 2007An efficient hybrid, nanostructured, epoxidation catalyst: titanium silsesquioxane-polystyrene copolymer supported on SBA-15citations
- 2006Characterization and reactivity of Ga+ and GaO+ cations in zeolite ZSM-5citations
- 2003Characterization of Ga/HZSM-5 and Ga/HMOR synthesized by chemical vapor deposition of trimethylgalliumcitations
- 2002Synthesis and characterization of microporous Fe-Si-O materials with tailored iron content from silsesquioxane precursorscitations
- 2002PEG-mediated silica pore formation monitored in situ by USAXS and SAXS: Systems with properties resembling diatomaceous silicacitations
- 2002Synthesis and characterisation of microporous bimetallic Fe-Cr-Si-O materials derived from silsesquioxane precursorscitations
- 2001Microporous Mg-Si-O and Al-Si-O Materials Derived from Metal Silsesquioxanescitations
- 2001Synthesis, structural characterization, and transmetalation reactions of a tetranuclear magnesium silsesquioxane complexcitations
- 2001Intermediate species and reaction pathways for the oxidation of ammonia on powdered catalystscitations
- 2000Characterization of the microporosity of chromia- and titania-pillared montmorillonites differing in pillar density. I. Adsorption of nitrogencitations
Places of action
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article
Intermediate species and reaction pathways for the oxidation of ammonia on powdered catalysts
Abstract
Ammonia oxidation reaction pathways on high surface area silver powder have been studied by TPD, temperature programmed reaction FT-Raman, and transient as well as steady-state ammonia oxidation experiments. NO was found to be the main reaction intermediate yielding N2O as well as N2. NO could be formed even at room temperature and when oxidized to NOx became adsorbed to the silver surface, thus blocking the active sites for oxygen dissociation. The dissociation of oxygen is thus believed to be the rate-controlling step for ammonia oxidation. The selectivity for N2, N2O, and NO is mainly determined by the surface oxygen coverage and by reaction temperature. The adsorbed NOx and N2Ox species are actually inhibitors for ammonia oxidation but these adsorbed species lower the surface oxygen coverage. Hence the selectivity for nitrogen is improved with increasing amounts of these adsorbed species.