The Synthesis and Structure of a Single-Phase, Nanocrystalline MoVW Mixed-Oxide Catalyst of the Mo5O14 Type | Sciact - CRIS-system of Boreskov Institute of Catalysis

The Synthesis and Structure of a Single-Phase, Nanocrystalline MoVW Mixed-Oxide Catalyst of the Mo5O14 Type Full article

Journal

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

Output data

Year: 2003, Volume: 215, Number: 2, Pages: 177-187 Pages count : 11 DOI: 10.1016/S0021-9517(03)00006-X

Tags

Catalysis, Mo5O 14, MoVW mixed oxide, Partial oxidation, Synthesis

Authors

Knobl S. ¹ , Zenkovets G.A. ² , Kryukova G.N. ² , Ovsitser O. ³ , Niemeyer D. ¹ , Schlögl R. ¹ , Mestl G. ³

Affiliations

1	Abteilung Anorganische Chemie, Fritz-Haber-Institut der Max-Planck-Gesellschaft, Faradayweg 4-6, 14195 Berlin, Germany
2	Boreskov Institute of Catalysis, pr. Lavrentieva, 5, 630090 Novosibirsk, Russia
3	NanoScape AG, Frankfurter Ring 193 A, 80807 Munich, Germany

The different preparation steps are characterized for the single-phase, crystalline, ternary oxide (MoVW)5O14, which is important for catalytic, mild selective oxidation reactions. For the synthesis of this oxide, solutions of ammonium heptamolybdate, ammonium metatungstate, and vanadyl oxalate were spray-dried followed by different thermal treatments. The structures of the materials formed at each preparation step, starting from the precursor to the final product, were studied using scanning and transmission electron microscopy, X-ray powder diffraction, thermal analysis, and Raman spectroscopy. Raman spectroscopy was also applied to shed some light into the aqueous chemistry of the mixed precursor solutions. Raman data indicate that a molecular structure which seems to be closely related to that of the final crystalline Mo5O14-type oxide is already formed in solution. X-ray diffraction revealed that the thermal treatment steps strongly affect the degree of crystallinity of the ternary Mo5O14 oxide. Transmission electron microscopy with energy-dispersive microanalysis confirmed the presence of V and W in the molybdenum oxide particles and gave evidence for the (010) plane as the most developed face of the crystals of this phase. Details of the structural transformation of this system at the different preparation and calcination steps are discussed in relation to their performance in the selective partial oxidation of acrolein to acrylic acid.

Knobl S. , Zenkovets G.A. , Kryukova G.N. , Ovsitser O. , Niemeyer D. , Schlögl R. , Mestl G.
The Synthesis and Structure of a Single-Phase, Nanocrystalline MoVW Mixed-Oxide Catalyst of the Mo5O14 Type

Journal of Catalysis. 2003. V.215. N2. P.177-187. DOI: 10.1016/S0021-9517(03)00006-X WOS Scopus РИНЦ ANCAN OpenAlex

Full text from publisher

Submitted:	May 21, 2002
Accepted:	Dec 4, 2002
Published online:	Apr 3, 2003
Published print:	Apr 25, 2003

Web of science:	WOS:000183219300001
Scopus:	2-s2.0-0038647293
Elibrary:	13421035
Chemical Abstracts:	2003:384440
Chemical Abstracts (print):	139:165002
OpenAlex:	W2054227364

DB	Citing
Web of science	44
Scopus	48
Elibrary	48
OpenAlex	56