Vanadium Species in New Catalysts for the Selective Oxidation of Methane to Formaldehyde: Activation of the Catalytic Sites Научная публикация
| Конференция |
Catalytic Nano-Oxides Research and Development in Europe : Present and Future 16-19 мая 2006 , Seville |
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| Журнал |
Catalysis Today
ISSN: 0920-5861 , E-ISSN: 1873-4308 |
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| Вых. Данные | Год: 2007, Том: 128, Номер: 3-4, Страницы: 176-182 Страниц : 7 DOI: 10.1016/j.cattod.2007.07.014 | ||||||
| Ключевые слова | Electrophilic oxygen species, Formaldehyde, Heterogeneous catalysis, Hydroxylated monomeric vanadium species, In situ IR spectroscopy, Mesoporous silica, Methane oxidation, Operando Raman spectroscopy, Supported vanadium oxide | ||||||
| Авторы |
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| Организации |
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Информация о финансировании (1)
| 1 | Российский фонд фундаментальных исследований | 06-03-72551 |
Реферат:
New vanadium oxide supported on mesoporous silica catalysts for the oxidation of methane to formaldehyde were investigated by infrared and Raman spectroscopies to identify and characterize the molecular structure of the most active and selective catalytic sites. In situ and operando experiments have been conducted in order to understand the redox and hydroxylation/dehydroxylation processes of the vanadium species. (SiO)2VO(OH) species were identified in these catalysts in reaction conditions and shown to undergo a deprotonation at 580 °C under vacuum, leading to a site giving a photoluminescence band at 550 nm attributed to reverse radiative decay from the excited triplet state:
(V4+–O−)* ⇆ (V5+double bond; length as m-dashO2−). An activation mechanism of vanadium monomeric species with electrophilic oxygen species is proposed.
Библиографическая ссылка:
Launay H.
, Loridant S.
, Nguyen D.L.
, Volodin A.M.
, Dubois J.L.
, Millet J.M.M.
Vanadium Species in New Catalysts for the Selective Oxidation of Methane to Formaldehyde: Activation of the Catalytic Sites
Catalysis Today. 2007. V.128. N3-4. P.176-182. DOI: 10.1016/j.cattod.2007.07.014 WOS Scopus РИНЦ CAPlusCA OpenAlex
Vanadium Species in New Catalysts for the Selective Oxidation of Methane to Formaldehyde: Activation of the Catalytic Sites
Catalysis Today. 2007. V.128. N3-4. P.176-182. DOI: 10.1016/j.cattod.2007.07.014 WOS Scopus РИНЦ CAPlusCA OpenAlex
Даты:
| Опубликована online: | 19 сент. 2007 г. |
| Опубликована в печати: | 30 окт. 2007 г. |
Идентификаторы БД:
| Web of science: | WOS:000250840600010 |
| Scopus: | 2-s2.0-35348839818 |
| РИНЦ: | 13542142 |
| Chemical Abstracts: | 2007:1208772 |
| Chemical Abstracts (print): | 148:33279 |
| OpenAlex: | W2088864418 |