Identification of the OH groups responsible for kinetic basicity on MgO surfaces by 1H MAS NMR
| Autor: | Jocelyne Maquet, Guylène Costentin, Hugo Petitjean, Michel Che, Hélène Lauron-Pernot, Christian Bonhomme, Céline Chizallet |
|---|---|
| Přispěvatelé: | Laboratoire de Réactivité de Surface (LRS), Université Pierre et Marie Curie - Paris 6 (UPMC)-Centre National de la Recherche Scientifique (CNRS), Laboratoire de Chimie de la Matière Condensée de Paris (site Paris VI) (LCMCP (site Paris VI)), Université Pierre et Marie Curie - Paris 6 (UPMC)-Collège de France (CdF (institution))-Ecole Nationale Supérieure de Chimie de Paris - Chimie ParisTech-PSL (ENSCP), Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Institut de Chimie du CNRS (INC)-Centre National de la Recherche Scientifique (CNRS) |
| Rok vydání: | 2009 |
| Předmět: |
chemistry.chemical_classification
Base (chemistry) Chemistry Stereochemistry Kinetics 02 engineering and technology [CHIM.INOR]Chemical Sciences/Inorganic chemistry 010402 general chemistry 021001 nanoscience & nanotechnology Heterogeneous catalysis 01 natural sciences Catalysis Dissociation (chemistry) 0104 chemical sciences Crystallography Proton NMR Reactivity (chemistry) Physical and Theoretical Chemistry 0210 nano-technology Spectroscopy ComputingMilieux_MISCELLANEOUS |
| Zdroj: | Journal of Catalysis Journal of Catalysis, Elsevier, 2009, pp.175-179. ⟨10.1016/J.jcat.2009.09.003⟩ Journal of Catalysis, 2009, pp.175-179. ⟨10.1016/J.jcat.2009.09.003⟩ |
| ISSN: | 0021-9517 1090-2694 |
| DOI: | 10.1016/j.jcat.2009.09.003 |
| Popis: | Depending on the localization of hydroxyl groups on MgO surface irregularities, their topology and coordination can differ. In order to discriminate their reactivity, three MgO samples with different morphologies are hydroxylated at various levels. From 1 H MAS NMR three kinds of OH groups can be distinguished. It is shown that the catalytic activity of base sites in the conversion of 2-methylbut-3-yn-2-ol is governed by species giving a 1 H NMR signal at δ 1C H and O 2C H formed by water dissociation on steps and corners. Their reactivity is discussed considering charge and orbital analysis from DFT. |
| Databáze: | OpenAIRE |
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