Understanding solvent effects on adsorption and protonation in porous catalysts
| Autor: | Hong Je Cho, Dionisios G. Vlachos, Peng Bai, Stavros Caratzoulas, Nicholas S. Gould, Sha Li, Bingjun Xu, Harrison Landfield |
|---|---|
| Jazyk: | angličtina |
| Rok vydání: | 2020 |
| Předmět: |
Science
General Physics and Astronomy Infrared spectroscopy Protonation 02 engineering and technology 010402 general chemistry 01 natural sciences General Biochemistry Genetics and Molecular Biology Article symbols.namesake Adsorption Mass transfer lcsh:Science Heterogeneous catalysis Multidisciplinary Chemistry General Chemistry 021001 nanoscience & nanotechnology 0104 chemical sciences Solvent Chemical engineering Physical chemistry Attenuated total reflection symbols lcsh:Q Solvent effects van der Waals force 0210 nano-technology |
| Zdroj: | Nature Communications, Vol 11, Iss 1, Pp 1-13 (2020) Nature Communications |
| ISSN: | 2041-1723 |
| DOI: | 10.1038/s41467-020-14860-6 |
| Popis: | Solvent selection is a pressing challenge in developing efficient and selective liquid phase catalytic processes, as predictive understanding of the solvent effect remains lacking. In this work, an attenuated total reflection infrared spectroscopy technique is developed to quantitatively measure adsorption isotherms on porous materials in solvent and decouple the thermodynamic contributions of van der Waals interactions within zeolite pore walls from those of pore-phase proton transfer. While both the pore diameter and the solvent identity dramatically impact the confinement (adsorption) step, the solvent identity plays a dominant role in proton-transfer. Combined computational and experimental investigations show increasingly favorable pore-phase proton transfer to pyridine in the order: water Liquid phase reactions mediated by solid catalysts occur in the presence of solvents whose role needs to be understood. The authors use attenuated total reflection infrared spectroscopy to measure liquid-phase pyridine adsorption isotherms in zeolites, elucidating the effect of coadsorbed solvents on the interactions. |
| Databáze: | OpenAIRE |
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