6533b7cffe1ef96bd125987d
RESEARCH PRODUCT
Mo-W-containing tetragonal tungsten bronzes through isomorphic substitution of molybdenum by tungsten
Benjamín SolsonaBenjamín SolsonaPatricia ConcepciónMaría Teresa Doménech-carbóJose NietoPablo BotellaJosé L. Jordásubject
Stereochemistrychemistry.chemical_elementGeneral ChemistryTTB-bronzePartial oxidation of propeneTungstenCatalysisMo–V–Te–Nb–W–P–O mixed metal oxidesTetragonal crystal systemCrystallographyLattice constantchemistryTransition metalIsomorphic substitution of molybdenum by tungstenMolybdenumPINTURAX-ray crystallographyHydrothermal synthesisHydrothermal synthesisPartial oxidationdescription
Mixed metal oxides based in Mo(W)–Nb–V–Te with tetragonal tungsten bronze (TTB) structure have been synthesized by a hydrothermal method from aqueous solutions of the corresponding Keggin-type heteropolyacids and further heat-treatment in N2 at 700 ◦ C. The materials have been characterized by several physico-chemical techniques, i.e. XRD, Raman, FTIR, SEM-EDS, and TEM. This procedure allows controlling the chemical species to be distributed in the different interstices of the TTB skeleton, which is a key factor to regulate the catalytic properties of the final solid. In this sense, the isomorphic replacement of Mo by W results in lattice parameter and crystal morphology variation, although the TTB structure is preserved to different degrees of substitution. The incorporation of tellurium to the TTB framework leads to active and selective catalysts in the partial oxidation of propene to acrolein.
| year | journal | country | edition | language |
|---|---|---|---|---|
| 2010-12-01 |