Development of the Local and Average Structure of a V-Mo-Nb Oxide Catalyst with Mo5O14-Like Structure during Synthesis from Nanostructured Precursors | Sciact - CRIS-система Института катализа

Development of the Local and Average Structure of a V-Mo-Nb Oxide Catalyst with Mo5O14-Like Structure during Synthesis from Nanostructured Precursors Научная публикация

Журнал

Zeitschrift für Kristallographie
ISSN: 0044-2968

Вых. Данные

Год: 2012, Том: 227, Страницы: 288-298 Страниц : 11 DOI: 10.1524/zkri.2012.1507

Ключевые слова

Catalysis, Disorder, Neutron powder diffraction, Pair distribution function

Авторы

Kardash Tatyana Yu. ^1,2 , Plyasova Ludmila M. ¹ , Kochubey Dmitry I. ¹ , Bondareva Valentina M. ¹ , Neder Reinhard B. ³

Организации

1	Boreskov Institute of Catalysis, Pr. Lavrentieva 5, Novobirsk 630090, Russia
2	Novosibirsk State University, Pirogova 2, Novosibirsk 630090, Russia
3	Institut fu¨ r Kristallographie und Strukturphysik, University of Erlangen-Nu¨ rnberg, Staudtstraße 3, 91058 Erlangen, Germany

Информация о финансировании (5)

1	Сибирское отделение Российской академии наук
2	Министерство образования и науки Российской Федерации	16.518.11.7019
3	Министерство образования и науки Российской Федерации	2.1.1./10165
4	German Academic Exchange Service
5	Federal Ministry of Education and Research

A combination of X-ray and neutron PDF measurements with powder diffraction and EXAFS data was used to determine the structures of a V—Mo—Nb-oxide catalyst and its poorly crystallized precursors that exhibit the strongest catalytic activities. The crystalline material belongs to space group P-4 21m, a = 22.8, c = 4.002, and is build up of pentagonal MeO7 bipyramids surrounded by edge sharing Me-octahedrons (Me = Mo, V, Nb). In the average structure all MeO7 units are at the same z-level, while the local structure analysis shows systematic shifts along [001]. Samples synthesized at 300 °C and 400 °C exhibit a nanostructure, whose local structure predates the final crystalline structure. Initial nanoparticles are spherical and grow predominantly along the c-axis. The successful analysis required a reverse analysis that took the crystalline material as starting model for the samples synthesized at lower temperatures.

Kardash T.Y. , Plyasova L.M. , Kochubey D.I. , Bondareva V.M. , Neder R.B.
Development of the Local and Average Structure of a V-Mo-Nb Oxide Catalyst with Mo5O14-Like Structure during Synthesis from Nanostructured Precursors
Zeitschrift für Kristallographie. 2012. V.227. P.288-298. DOI: 10.1524/zkri.2012.1507 WOS Scopus РИНЦ CAPlusCA OpenAlex

Поступила в редакцию:	15 дек. 2011 г.
Принята к публикации:	25 янв. 2012 г.
Опубликована в печати:	1 мая 2012 г.

Web of science:	WOS:000305099900010
Scopus:	2-s2.0-84865040440
РИНЦ:	20494854
Chemical Abstracts:	2012:811603
Chemical Abstracts (print):	157:310808
OpenAlex:	W2330515369

БД	Цитирований
Web of science	6
Scopus	7
РИНЦ	6
OpenAlex	6