Characterization of Electron-Acceptor Sites on the Surface of Sulfated and Chlorinated Alumina by EPR using Spin Probes Доклады на конференциях
Язык | Английский | ||||
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Тип доклада | Стендовый | ||||
Конференция |
EuropaCat-XII: 12th European Congress on Catalysis “Catalysis: Balancing the use of fossil and renewable resources” 30 авг. - 4 сент. 2015 , Казань |
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Реферат:
Alumina modification with sulfates was found to result in a gradual increase of the concentration of electron-acceptor sites characterized using the formation of radical cations from aromatic molecules with different ionization potentials. The strongest electron-acceptor sites tested with toluene immediately after adsorption were only detected with a concentration of SO3 not less than 4%. The weakest sites tested with perylene presented on the surface of all the samples, with their concentration on 12% SO3 sample being 3×1019 g -1. Chlorination only led to minor growth of the concentration of the weak sites. Recommendations on the use of spin probes for testing electron-acceptor sites with different strength are suggested. A mechanism of the polycondensation of aromatic probes on the surface electron-acceptor sites explaining experimental results and possible structures of such sites were proposed
Библиографическая ссылка:
Shuvarakova E.I.
, Bedilo A.F.
Characterization of Electron-Acceptor Sites on the Surface of Sulfated and Chlorinated Alumina by EPR using Spin Probes
EuropaCat-XII: 12th European Congress on Catalysis “Catalysis: Balancing the use of fossil and renewable resources” 30 Aug - 4 Sep 2015
Characterization of Electron-Acceptor Sites on the Surface of Sulfated and Chlorinated Alumina by EPR using Spin Probes
EuropaCat-XII: 12th European Congress on Catalysis “Catalysis: Balancing the use of fossil and renewable resources” 30 Aug - 4 Sep 2015