Monitoring Transport Phenomena of Paramagnetic Metal-Ion Complexes Inside Catalyst Bodies with Magnetic Resonance Imaging | Sciact - CRIS-система Института катализа

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

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

Bergwerff Jaap A. ¹ , Lysova Anna A. ^2,3 , Espinosa-Alonso Leticia ¹ , Koptyug Igor V. ² , Weckhuysen Bert M. ¹

Организации

1	Inorganic Chemistry and Catalysis Group, Department of Chemistry, Faculty of Science, Utrecht University, Sorbonnelaan 16, 3584 CA Utrecht (The Netherlands)
2	International Tomography Center SB Ras3A Institutskaya Street, Novosibirsk 630090 (Russia)
3	Boreskov Institute of Catalysis Sb RAS5 Ak. Lavrent’eva Prospekt, Novosibirsk 630090 (Russia)

Информация о финансировании (9)

1	Российский фонд фундаментальных исследований	05-03-32472
2	Президиум РАН	5.1.1
3	Президиум РАН	5.2.3
4	Сибирское отделение Российской академии наук	11
5	Совет по грантам Президента Российской Федерации	МК-5135.2007.3
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

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.

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 CAPlusCA OpenAlex

Полный текст от издателя

Поступила в редакцию:	29 июн. 2007 г.
Опубликована online:	7 янв. 2008 г.
Опубликована в печати:	7 мар. 2008 г.

Web of science:	WOS:000254186800006
Scopus:	2-s2.0-43949083782
РИНЦ:	13583507
Chemical Abstracts:	2008:507767
Chemical Abstracts (print):	149:23183
OpenAlex:	W2131388718

БД	Цитирований
Web of science	50
Scopus	50
РИНЦ	49
OpenAlex	51