Rationalizing Inter- and Intracrystal Heterogeneities in Dealuminated Acid Mordenite Zeolites by Stimulated Raman Scattering Microscopy Correlated with Super-resolution Fluorescence Microscopy
| Autor: | Jordi Van Loon, Dirk De Vos, Maarten B. J. Roeffaers, Johan Hofkens, Kuan-Lin Liu, Hiroshi Uji-i, Alexey V. Kubarev |
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| Jazyk: | angličtina |
| Rok vydání: | 2014 |
| Předmět: |
Materials science
Stimulated Raman Scattering Microscopy General Engineering General Physics and Astronomy super-resolution fluorescence microscopy Fluorescence Mordenite Article Catalysis symbols.namesake Crystallography Raman microscopy Chemical engineering mordenite symbols Fluorescence microscope single-molecule microscopy General Materials Science Reactivity (chemistry) stimulated Raman scattering Nanoscopic scale dealumination Raman scattering |
| Zdroj: | ACS Nano |
| Popis: | Dealuminated zeolites are widely used acid catalysts in research and the chemical industry. Bulk-level studies have revealed that the improved catalytic performance results from an enhanced molecular transport as well as from changes in the active sites. However, fully exploiting this information in rational catalyst design still requires insight in the intricate interplay between both. Here we introduce fluorescence and stimulated Raman scattering microscopy to quantify subcrystal reactivity as well as acid site distribution and to probe site accessibility in the set of individual mordenite zeolites. Dealumination effectively introduces significant heterogeneities between different particles and even within individual crystals. Besides enabling direct rationalization of the nanoscale catalytic performance, these observations reveal valuable information on the industrial dealumination process itself. ispartof: ACS NANO vol:8 issue:12 pages:12650-12659 ispartof: location:United States status: published |
| Databáze: | OpenAIRE |
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