Monitoring Transport Phenomena of Paramagnetic Metal-Ion Complexes Inside Catalyst Bodies with Magnetic Resonance Imaging Научная публикация
Журнал |
Chemistry - A European Journal
ISSN: 0947-6539 , E-ISSN: 1521-3765 |
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Вых. Данные | Год: 2008, Том: 14, Номер: 8, Страницы: 2363-2374 Страниц : 12 DOI: 10.1002/chem.200700990 | ||||||
Ключевые слова | Cobalt, Magnetic resonance imaging, Supported catalysts, UV/Vis spectroscopy | ||||||
Авторы |
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Организации |
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Информация о финансировании (9)
1 | Президиум РАН | 5.1.1 |
2 | Сибирское отделение Российской академии наук | 11 |
3 | Совет по грантам Президента Российской Федерации | МК-5135.2007.3 |
4 | Президиум РАН | 5.2.3 |
5 | Российский фонд фундаментальных исследований | 05-03-32472 |
6 | Совет по грантам Президента Российской Федерации | НШ-4821.2006.3 |
7 | Региональный общественный Фонд содействия отечественной науке | |
8 | Albemarle (Netherlands) | |
9 | Netherlands Organisation for Scientific Research | NWO-CW-VICI |
Реферат:
An indirect magnetic resonance imaging (MRI) method has been developed to determine in a noninvasive
manner the distribution of paramagnetic Co2+ complexes inside Co/Al2O3 catalyst extrudates after impregnation
with Co2+/citrate solutions of different pH and citrate concentrations. UV/Vis/NIR microspectroscopic measurements were carried out simultaneously to obtain complementary information on the nature of the Co2+ complexes. In this way, it could be confirmed that the actual distribution of Co2+ inside the extrudates could be derived from the MRI images. By combining these space- and time-resolved techniques, information was obtained on both the strength and the mode of interaction between [Co(H2O)6] 2+ and different Co2+ citrate complexes with the Al2O3 support. Complexation of Co2+ by citrate was found to lead to a stronger interaction of Co with the support surface and formation of an eggshell distribution of Co2+ complexes after impregnation. By addition of free citrate and by changing the pH of the impregnation solution, it was possible to obtain the rather uncommon eggyolk and egg-white distributions of Co2+ inside the extrudates after impregnation. In other words, by carefully altering the chemical composition and pH of the impregnation solution, the macrodistribution of Co2+ complexes inside catalyst extrudates could be fine-tuned from eggshell over egg white and egg yolk to uniform.
Библиографическая ссылка:
Bergwerff J.A.
, Lysova A.A.
, Espinosa-Alonso L.
, Koptyug I.V.
, Weckhuysen B.M.
Monitoring Transport Phenomena of Paramagnetic Metal-Ion Complexes Inside Catalyst Bodies with Magnetic Resonance Imaging
Chemistry - A European Journal. 2008. V.14. N8. P.2363-2374. DOI: 10.1002/chem.200700990 WOS Scopus РИНЦ
Monitoring Transport Phenomena of Paramagnetic Metal-Ion Complexes Inside Catalyst Bodies with Magnetic Resonance Imaging
Chemistry - A European Journal. 2008. V.14. N8. P.2363-2374. DOI: 10.1002/chem.200700990 WOS Scopus РИНЦ
Файлы:
Полный текст от издателя
Даты:
Поступила в редакцию: | 29 июн. 2007 г. |
Опубликована online: | 7 янв. 2008 г. |
Опубликована в печати: | 7 мар. 2008 г. |
Идентификаторы БД:
Web of science | WOS:000254186800006 |
Scopus | 2-s2.0-43949083782 |
РИНЦ | 13583507 |
Chemical Abstracts | 2008:507767 |
Chemical Abstracts (print) | 149:23183 |
OpenAlex | W2131388718 |