Nanocrystalline Structure of an Active Phase in V-MoNb-O Catalysts for Ethane (Amm)oxidation | Sciact - CRIS-система Института катализа

Nanocrystalline Structure of an Active Phase in V-MoNb-O Catalysts for Ethane (Amm)oxidation Тезисы доклада

Конференция

XXI International Union of Crystallography Congress
23-31 авг. 2008 , Osaka

Журнал

Acta Crystallographica Section A: Foundations and Advances (предыдущее название Acta Crystallographica Section A: Foundations of Crystallography)
ISSN: 2053-2733

Вых. Данные

Год: 2008, Том: 64, Номер статьи : P11.05.79, Страниц : 1 DOI: 10.1107/S0108767308082949

Ключевые слова

V-Mo-Nb-O catalysts, nanostructure, Mo5O14

Авторы

Kardash Tatyana U. ¹ , Plyasova Ludmila M. ¹ , Bondareva Valentina M. ¹ , Cherepanova Svetlana V. ¹ , Kochubey Dmitry I. ¹

Организации

1	Boreskov Institute of Catalysis, SB RAS, Laboratory of Sructural methods of investigation, Prospekt Ak. Lavrentieva, 5, Novosibirsk, Novosibirsk region, 630090, Russia

Информация о финансировании (1)

Российский фонд фундаментальных исследований

07-03-00203

Development of catalysts based on nanomaterials and characterization of their structure has become the great deal of scientific attention in material science in the last time. The present study is devoted to the investigation of structural features of an active phase in V-Mo-Nb-O catalysts for selective transformations of ethane to ethylene, acetic acid and acetonitrile [1-2]. The catalysts were synthesized by mixing aqueous solutions of ammonium paramolybdate, ammonium metavanadate and niobium oxalate with further drying and calcination in air at 400 ℃ . Samples were analyzed by XRD, HREM and EXAFS. The active component of these catalysts is a triple compound with Me5O14-like structure (Me=Mo, V, Nb) and variable composition [1-2]. The active catalyst is XRD amorphous and characterized by the presence of both narrow reflections at d = 4.00, 2.00 Å, and broad reflection at d = 3.40 Å. HREM investigation reveal 1D-ordared nanostructure with block size <5 nm and interlayer distance of 0.40 nm. In perpendicular plane, networks are built by disordered Me5O14-like subunits, which consist of MeO7-bipiramides connected by edge with five octahedra [3]. Model of active nanocrystalline phase was proposed according to HREM data, XRD pattern modeling by DFA method and local structure investigation by EXAFS.

Kardash T.U. , Plyasova L.M. , Bondareva V.M. , Cherepanova S.V. , Kochubey D.I.
Nanocrystalline Structure of an Active Phase in V-MoNb-O Catalysts for Ethane (Amm)oxidation
Acta Crystallographica Section A: Foundations and Advances (предыдущее название Acta Crystallographica Section A: Foundations of Crystallography). 2008. V.64. P11.05.79 :1-1. DOI: 10.1107/S0108767308082949 WOS РИНЦ OpenAlex

Опубликована в печати:

23 авг. 2008 г.

Web of science:	WOS:000480420705101
РИНЦ:	47691620
OpenAlex:	W2320526094

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