Thermal behavior of Mg−Ni‐phyllosilicate nanoscrolls and performance of the resulting composites in hexene‐1 and acetone hydrogenation
| Autor: | Valery L. Ugolkov, Sergey A. Lermontov, Alexandre Nominé, D. A. Kozlov, A. A. Krasilin, Stéphanie Bruyère, E. A. Straumal, E. K. Khrapova, Thierry Belmonte, Tatyana S. Kunkel, Vasily A. Lebedev, Jaafar Ghanbaja |
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| Přispěvatelé: | A.F. Ioffe Physical-Technical Institute, Russian Academy of Sciences [Moscow] (RAS), Grebenshchikov Institute of Silicate Chemistry, Russian Academy of Sciences, Institute of Physiologically Active Compounds, Russian Academy of Sciences - Chernogolovka, Bernal Institute [Limerick, Ireland], University of Limerick (UL), Lomonosov Moscow State University (MSU), Moscow Institute of Physics and Technology [Moscow] (MIPT), ITMO University [Russia], Institut Jean Lamour (IJL), Université de Lorraine (UL)-Institut de Chimie du CNRS (INC)-Centre National de la Recherche Scientifique (CNRS), Russian Science Foundation, French Ministry of Higher Education |
| Jazyk: | angličtina |
| Rok vydání: | 2021 |
| Předmět: |
Materials science
metal Energy Engineering and Power Technology reduction 02 engineering and technology 010402 general chemistry Heterogeneous catalysis 7. Clean energy 01 natural sciences nanotubes Biomaterials Metal chemistry.chemical_compound Thermal Materials Chemistry Acetone Hydrothermal synthesis Renewable Energy Sustainability and the Environment [CHIM.ORGA]Chemical Sciences/Organic chemistry [CHIM.MATE]Chemical Sciences/Material chemistry [CHIM.CATA]Chemical Sciences/Catalysis 021001 nanoscience & nanotechnology 0104 chemical sciences hydrothermal synthesis heterogeneous catalysis chemistry Chemical engineering Hexene METAL visual_art visual_art.visual_art_medium nanoparticles 0210 nano-technology |
| Zdroj: | ChemNanoMat ChemNanoMat, Wiley, 2021, 7 (3), pp.257-269. ⟨10.1002/cnma.202000573⟩ |
| ISSN: | 2199-692X |
| DOI: | 10.1002/cnma.202000573⟩ |
| Popis: | peer-reviewed The full text of this article will not be available in ULIR until the embargo expires on the 05/11/2021 Here we report on the thermal properties of Mg−Ni‐phyllosilicate nanoscrolls as a promising precursor for production of Ni/silicate composite catalysts. Spontaneous scrolling of the phyllosilicate layer originating from size difference between metal‐oxygen and silica sheets provides high surface area of the catalyst. Metal nanoparticles can be obtained directly from the matrix by H2 reduction. The phyllosilicate structure passed through a number of transformations including partial dehydroxylation with formation of sepiolite‐like phase followed by silicate or oxide crystallization. Temperature ranges of these transitions overlapped with the reduction process sophisticating the H2 consumption profiles. In particular, some amount of Ni2+ got sealed up by the sepiolite structural features, that opened a path for the tuning of Ni0 : Ni2+ ratio of the catalyst. An increase of Ni content in the system yielded a decrease in the metal nanoparticles sizes due to both high intensity of nucleation and type of residual matrix. Ni nanoparticles size distribution and specific surface area of the composite catalysts governed conversion rate of hexene‐1 and acetone hydrogenation. In the view of the turnover frequency MgNi2Si2O5(OH)4 precursors were slightly more preferable than pure Ni3Si2O5(OH)4. |
| Databáze: | OpenAIRE |
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