Nanoscale insights into Pt-impregnated mixtures of zeolites
| Autor: | Antoine Daudin, João M. Silva, Christophe Bouchy, Anne-Lise Taleb, M. Filipa Ribeiro, Pedro S. F. Mendes |
|---|---|
| Jazyk: | angličtina |
| Rok vydání: | 2017 |
| Předmět: |
Materials science
chemistry.chemical_element 02 engineering and technology 010402 general chemistry 01 natural sciences Catalysis Metal N-Hexadecane Hydroisomerization chemistry.chemical_compound Quantification Organic chemistry General Materials Science Zeolite Nanoscopic scale Tomography Platinum Catalysts Mesoporosity Renewable Energy Sustainability and the Environment Y-Zeolites General Chemistry 021001 nanoscience & nanotechnology Hydrocarbons 0104 chemical sciences Silanol Electron tomography chemistry Chemical engineering visual_art visual_art.visual_art_medium 3D Electron-Microscopy 0210 nano-technology Selectivity |
| Zdroj: | Repositório Científico de Acesso Aberto de Portugal Repositório Científico de Acesso Aberto de Portugal (RCAAP) instacron:RCAAP |
| Popis: | A series of catalysts prepared by Pt deposition over intimate mixtures of HUSY and HBEA zeolites was investigated for the first time and compared to individual Pt/zeolite solids. The samples were characterized through macroscopic techniques and at the nanoscale by electron microscopy and electron tomography, in order to evaluate both the acid and the hydrogenation functions. Comparable macroscopic properties were observed between Pt-impregnated individuals and zeolite mixtures. In contrast, at the nanoscale, differences were evident. When mixtures of zeolites were impregnated, Pt was not homogeneously distributed over the sample. In fact, Pt was located mainly on the HBEA zeolite rather than on HUSY, as confirmed by TEM-EDS semi-quantification. This selectivity in Pt location was tentatively explained by the higher amount of terminal silanol and EFAL species in the HBEA sample. The preferential Pt location at the nanoscale may open up new possibilities in the design and application of hybrid catalysts. info:eu-repo/semantics/publishedVersion |
| Databáze: | OpenAIRE |
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