Development of the Local and Average Structure of a V-Mo-Nb Oxide Catalyst with Mo5O14-Like Structure during Synthesis from Nanostructured Precursors Full article
| Journal |
Zeitschrift für Kristallographie
ISSN: 0044-2968 |
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| Output data | Year: 2012, Volume: 227, Pages: 288-298 Pages count : 11 DOI: 10.1524/zkri.2012.1507 | ||||||
| Tags | Catalysis, Disorder, Neutron powder diffraction, Pair distribution function | ||||||
| Authors |
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| Affiliations |
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Funding (5)
| 1 | Siberian Branch of the Russian Academy of Sciences | |
| 2 | The Ministry of Education and Science of the Russian Federation | 16.518.11.7019 |
| 3 | The Ministry of Education and Science of the Russian Federation | 2.1.1./10165 |
| 4 | German Academic Exchange Service | |
| 5 | Federal Ministry of Education and Research |
Abstract:
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.
Cite:
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 ANCAN OpenAlex
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 ANCAN OpenAlex
Dates:
| Submitted: | Dec 15, 2011 |
| Accepted: | Jan 25, 2012 |
| Published print: | May 1, 2012 |
Identifiers:
| Web of science: | WOS:000305099900010 |
| Scopus: | 2-s2.0-84865040440 |
| Elibrary: | 20494854 |
| Chemical Abstracts: | 2012:811603 |
| Chemical Abstracts (print): | 157:310808 |
| OpenAlex: | W2330515369 |