Mo-V-Te-Nb Oxide Catalysts: Reactivity of Different Oxygen Species in Partial and Deep Oxidation
Full article
| Общее |
Language:
Английский,
Genre:
Full article,
Status:
Published,
Source type:
Original
|
| Journal |
Journal of Molecular Catalysis A: Chemical
ISSN: 1381-1169
|
| Output data |
Year: 2014,
Volume: 392,
Pages: 61-66
Pages count
: 6
DOI:
10.1016/j.molcata.2014.04.023
|
| Tags |
Isotope oxygen exchange, MoVTeNb oxide catalysts, Selective oxidation, SSITKA |
| Authors |
Sadovskaya Ekaterina
1,2
,
Goncharov Vladimir
1
,
Popova Galina
1
,
Ishchenko Evgeniya
1
,
Frolov Dmitry
3
,
Fedorova Anna
3
,
Andrushkevich Tamara
1
|
| Affiliations |
| 1 |
Boreskov Insitute of Catalysis SB RAS, Pr. Lavrientieva 5, Novosibirsk, 630090, Russia
|
| 2 |
Novosibirsk State University, Pirogova Str. 2, Novosibirsk, 630090, Russia
|
| 3 |
Chemistry Department, Moscow State University, Leninskiye Gory 1-3, Moscow, 119899, Russia
|
|
Funding (2)
|
1
|
Russian Foundation for Basic Research
|
11-03-00584
|
|
2
|
The Ministry of Education and Science of the Russian Federation
|
|
Isotopic oxygen exchange on the surface of Mo-V-Te-Nb oxide catalysts was studied. Catalyst samples contained more than 95% of (i) orthorhombic phase M1, (ii) pseudo hexagonal phase M2, or (iii) layered phase with structure Me5O14 (Me – Mo, V, Nb). Two forms of exchangeable oxygen were found on the surface, i.e. strongly bonded lattice oxygen and relatively weakly bonded adsorbed oxygen. According to in situ studies with isotope 18O adsorbed oxygen leads to deep oxidation products, while lattice oxygen participates mainly in the partial oxidation processes. Weakly bonded oxygen concentration decreases in series: Me5O14 > M2 > M1 and thus selectivity towards partial oxidation increases.