Co3O4-MnOx oxides supported on SBA-15 for CO and VOCs oxidation
| Autor: | S. Todorova, Ludovic Josien, I. Ivanova, Hristo Kolev, Jean-Luc Blin, Anton Naydenov, D. Filkova, Laure Michelin, K. Tenchev, Bénédicte Lebeau, Pierrick Gaudin, A. Dotzeva, Ralitsa Velinova, Loïc Vidal |
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| Přispěvatelé: | Lebeau, Bénédicte, Institute of Catalysis (Sofia, Bulgaria), Bulgarian Academy of Sciences (BAS), Laboratoire Lorrain de Chimie Moléculaire (L2CM), Institut de Chimie du CNRS (INC)-Université de Lorraine (UL)-Centre National de la Recherche Scientifique (CNRS), Institut de Science des Matériaux de Mulhouse (IS2M), Université de Haute-Alsace (UHA) Mulhouse - Colmar (Université de Haute-Alsace (UHA))-Institut de Chimie du CNRS (INC)-Centre National de la Recherche Scientifique (CNRS)-Matériaux et Nanosciences Grand-Est (MNGE), Université de Strasbourg (UNISTRA)-Université de Haute-Alsace (UHA) Mulhouse - Colmar (Université de Haute-Alsace (UHA))-Institut National de la Santé et de la Recherche Médicale (INSERM)-Institut de Chimie du CNRS (INC)-Centre National de la Recherche Scientifique (CNRS)-Université de Strasbourg (UNISTRA)-Institut National de la Santé et de la Recherche Médicale (INSERM)-Centre National de la Recherche Scientifique (CNRS)-Réseau nanophotonique et optique, Université de Strasbourg (UNISTRA)-Université de Haute-Alsace (UHA) Mulhouse - Colmar (Université de Haute-Alsace (UHA))-Centre National de la Recherche Scientifique (CNRS)-Université de Strasbourg (UNISTRA)-Centre National de la Recherche Scientifique (CNRS), Centre National de la Recherche Scientifique (CNRS)-Matériaux et nanosciences d'Alsace (FMNGE), Institut de Chimie du CNRS (INC)-Université de Strasbourg (UNISTRA)-Université de Haute-Alsace (UHA) Mulhouse - Colmar (Université de Haute-Alsace (UHA))-Institut National de la Santé et de la Recherche Médicale (INSERM)-Centre National de la Recherche Scientifique (CNRS)-Institut de Chimie du CNRS (INC)-Université de Strasbourg (UNISTRA)-Université de Haute-Alsace (UHA) Mulhouse - Colmar (Université de Haute-Alsace (UHA))-Institut National de la Santé et de la Recherche Médicale (INSERM)-Centre National de la Recherche Scientifique (CNRS)-Réseau nanophotonique et optique, Centre National de la Recherche Scientifique (CNRS)-Université de Strasbourg (UNISTRA)-Université de Haute-Alsace (UHA) Mulhouse - Colmar (Université de Haute-Alsace (UHA))-Centre National de la Recherche Scientifique (CNRS)-Université de Strasbourg (UNISTRA), Silviya Todorova, Jean-Luc Blin, Silviya Zh Todorova, Hristo G Kolev |
| Jazyk: | angličtina |
| Rok vydání: | 2020 |
| Předmět: |
Materials science
Oxide Co-Mn-SBA-15 chemistry.chemical_element 02 engineering and technology Manganese 010402 general chemistry 01 natural sciences Catalysis chemistry.chemical_compound Specific surface area [CHIM] Chemical Sciences [CHIM]Chemical Sciences propane oxidation [CHIM.MATE] Chemical Sciences/Material chemistry n-hexane combustion [CHIM.CATA] Chemical Sciences/Catalysis General Chemistry [CHIM.CATA]Chemical Sciences/Catalysis [CHIM.MATE]Chemical Sciences/Material chemistry 021001 nanoscience & nanotechnology CO oxidation 0104 chemical sciences SBA-15 chemistry Chemical engineering Mixed oxide 0210 nano-technology Mesoporous material Cobalt Carbon monoxide |
| Zdroj: | Catalysis Today Catalysis Today, 2020, 357, pp.602-612. ⟨10.1016/j.cattod.2019.05.018⟩ Catalysis Today, Elsevier, 2020, 357, pp.602-612. ⟨10.1016/j.cattod.2019.05.018⟩ |
| ISSN: | 0920-5861 |
| Popis: | International audience; Mono-and bi-component cobalt and manganese samples were prepared by ''twosolvent'' technique using SBA-15 as a support. The obtained materials were characterized by SAXS (Small angle X-Ray scattering), N2 adsorption-desorption, X-ray diffraction, TEM (Transmission Electron Microscopy), X-ray photoelectron spectroscopy (XPS), TPR (Temperature-programmed reduction) and O2-TPD (Oxygen Temperature-programmed desorption). The catalytic properties were tested in the complete oxidation of propane, nhexane, and carbon monoxide. The modification of the SBA-15 materials with Co, Mn or simultaneously with both cobalt and manganese does not change significantly the mesoporous structure, however its pores are partially blocked by the oxides, resulting in the decrease in the specific surface area and in the pore volume. In the case of mono component Co-SBA-15, the clusters of Co3O4 are on the surface and they are partially located inside the pore system of SBA-15 while for Mn-SBA-15 sample, the oxide phases preferentially fill up the channels of SBA-15 forming nanowires. The mixed oxide nanowires are formed in the channels of CoMn-SBA-15 material along with small nanoparticles, aggregated outside of the channels. The mesoporous structure and morphology of SBA-15, type of oxide phases and the size of the oxide particles remain almost unchanged after tests in reaction of complete nhexane oxidation and this is valid for all studied samples. The observed resistance towards agglomeration can be attributed to the mesoporous structure. On the other hand, after reaction the surface concentration of different cobalt and manganese species undergoes significant changes, except for the sample with equimolar Co:Mn ratio. The most active catalyst among bi-component Co-Mn samples in all studied reactions, is the catalyst where the Co:Mn molar ratio is 1:0.5, which can be explained by the formation of finely divided oxides, thus ensuring highest reducibility and oxygen mobility. |
| Databáze: | OpenAIRE |
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