Structural and Reactive Relevance of V + Nb Coverage on Alumina of V{single bond}Nb{single bond}O/Al2O3 Catalytic Systems | Sciact - CRIS-система Института катализа

Structural and Reactive Relevance of V + Nb Coverage on Alumina of V{single bond}Nb{single bond}O/Al2O3 Catalytic Systems Научная публикация

Журнал

Journal of Catalysis
ISSN: 0021-9517 , E-ISSN: 1090-2694

Вых. Данные

Год: 2008, Том: 255, Номер: 1, Страницы: 94-103 Страниц : 10 DOI: 10.1016/j.jcat.2008.01.029

Ключевые слова

1H MAS NMR, 27Al MAS NMR, Alumina, FTIR, In situ, Methanol probe reaction, Supported vanadia-niobia

Авторы

Lewandowska Anna E. ^1,2 , Bañares Miguel A. ¹ , Ziolek Maria ² , Khabibulin Dzhalil F. ³ , Lapina Olga B. ³

Организации

1	Instituto de Catálisis y Petroleoquímica, CSIC, Marie Curie 2, E-28049 Madrid, Spain
2	A. Mickiewicz University, Faculty of Chemistry, Grunwaldzka 6, 60-780 Poznan, Poland
3	Boreskov Institute of Catalysis SB RAS, Prosp. Akad. Lavrentieva 5, 630090 Novosibirsk, Russia

Информация о финансировании (5)

1	Российский фонд фундаментальных исследований	07-03-00695
2	European Commission	D36/0006/06
3	Ministry of Economic Affairs and Digital Transformation	CTQ2005-02802/PPQ
4	North Atlantic Treaty Organization	ESP.NR. NRCLG 981857
5	Ministry of Science and Higher Education	118/COS/2007/03

Vanadium and niobium species (together and separately) were loaded on gamma alumina, and the resulting catalysts were run in the methanol conversion. This reaction was studied by both GC analysis and FTIR study in the flow system. The catalytic properties are discussed based on the combined FTIR and 27Al, 51V and 1H MAS NMR studies. The NMR studies revealed a different mechanism of interaction between Nb and Al2O3 than that between V and Al2O3. This predetermines the structure of vanadium sites in bimetallic VNb/Al samples. The effect of coverage was considered for various metal loadings ranging from below to above monolayer. One of our most interesting findings is that the surface Nb oxide species exhibited a redox character below monolayer but were acidic above monolayer. 27Al MAS NMR revealed a strong alumina–Nb interaction that may account for its redox performance. Moreover, the role of sulfate from vanadium precursor is evidenced.

Lewandowska A.E. , Bañares M.A. , Ziolek M. , Khabibulin D.F. , Lapina O.B.
Structural and Reactive Relevance of V + Nb Coverage on Alumina of V{single bond}Nb{single bond}O/Al2O3 Catalytic Systems
Journal of Catalysis. 2008. V.255. N1. P.94-103. DOI: 10.1016/j.jcat.2008.01.029 WOS Scopus РИНЦ CAPlusCA OpenAlex

Поступила в редакцию:	23 нояб. 2007 г.
Принята к публикации:	23 янв. 2008 г.
Опубликована online:	6 мар. 2008 г.
Опубликована в печати:	1 апр. 2008 г.

Web of science:	WOS:000254966500010
Scopus:	2-s2.0-40249109758
РИНЦ:	13573212
Chemical Abstracts:	2008:325211
Chemical Abstracts (print):	148:426327
OpenAlex:	W2039927316

БД	Цитирований
Web of science	16
Scopus	17
РИНЦ	17
OpenAlex	17