Probing the Surface Acidity of Modified γ-Alumina with H and 15N High-Resolution Solid State NMR Spectroscopy Full article
Journal |
Reaction Kinetics and Catalysis Letters
ISSN: 0133-1736 , E-ISSN: 1588-2837 |
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Output data | Year: 1998, Volume: 65, Number: 1, Pages: 131-138 Pages count : 8 DOI: 10.1007/BF02475326 | ||
Tags | Brönsted and Lewis acidic sites, Nuclear magnetic resonance, γ-alumina | ||
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Abstract:
1H MAS NMR and15N NMR studies of adsorbed N2 and N2O molecules were used to characterize Brönsted and Lewis acidic sites of unmodified γ-Al2O3 and γ-Al2O3 modified with NaOH. Changes in the concentrations of surface hydroxyls with the increase in the number of more “basic” OH groups for NaOH/γ-Al2O3 have been found by1H MAS NMR experiments. Two different types of Lewis acidic sites in γ-Al2O3 have been revealed using15N NMR studies. The strongest sites are poisoned even at small NaOH concentrations (ca. 0.05 wt.%). Not only the number of electron-accepting sites but also their strength are supposed to decrease for modified γ-alumina.
Cite:
Filimonova S.V.
, Mastikhin V.M.
Probing the Surface Acidity of Modified γ-Alumina with H and 15N High-Resolution Solid State NMR Spectroscopy
Reaction Kinetics and Catalysis Letters. 1998. V.65. N1. P.131-138. DOI: 10.1007/BF02475326 WOS Scopus РИНЦ
Probing the Surface Acidity of Modified γ-Alumina with H and 15N High-Resolution Solid State NMR Spectroscopy
Reaction Kinetics and Catalysis Letters. 1998. V.65. N1. P.131-138. DOI: 10.1007/BF02475326 WOS Scopus РИНЦ
Dates:
Submitted: | Feb 5, 1997 |
Accepted: | Apr 10, 1997 |
Published print: | Sep 1, 1998 |
Identifiers:
Web of science | WOS:000076925900019 |
Scopus | 2-s2.0-0003119543 |
Elibrary | 13304225 |
Chemical Abstracts | 1999:276040 |
Chemical Abstracts (print) | 131:23922 |
OpenAlex | W2076345542 |