1H and 93Nb Solid-State NMR and IR Study of Acidity of Nanodisperse Nb2O5·nH2O Научная публикация
| Журнал |
Applied Magnetic Resonance
ISSN: 0937-9347 , E-ISSN: 1613-7507 |
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| Вых. Данные | Год: 2019, Том: 50, Номер: 4, Страницы: 589-597 Страниц : 9 DOI: 10.1007/s00723-019-01118-8 | ||||
| Ключевые слова | GENERALIZED GRADIENT APPROXIMATION; NIOBIC ACID; BRONSTED ACID; NANOSHEETS; CATALYSTS; SURFACES | ||||
| Авторы |
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| Организации |
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Информация о финансировании (2)
| 1 | Министерство науки и высшего образования Российской Федерации (с 15 мая 2018) | ГЗ-2017-2020 |
| 2 | Российский фонд фундаментальных исследований | 17-03-00531 |
Реферат:
Niobium oxide hydrate is a promising material for various heterogeneous catalytic processes due to its strong acidity and stability in aqueous medium. While different synthesis conditions may lead to various particle morphologies, the effect of morphology of Nb2O5·nH2O particles on their acidic properties is not fully understood yet. In this paper, we have successfully synthesized and characterized nanodisperse niobium oxide hydrate. Using infrared (IR) spectroscopy, we demonstrated that the sample exhibits strong Brønsted acidity close in strength to sulfuric acid. Furthermore, solid-state nuclear magnetic resonance (NMR) spectroscopy in combination with ab initio calculations gave additional insight into the nature of strong acidic sites and proved to be a useful tool for identification of acidic sites in Nb2O5·nH2O systems. Thus, we have shown that it is not necessary to follow difficult high-temperature solid-state processes or processes with ammonia, which often contaminates the material, to synthesize highly acidic nanodisperse Nb2O5·nH2O.
Библиографическая ссылка:
Yakovlev I.V.
, Papulovskiy E.
, Paukshtis E.A.
, Bondareva V.M.
, Toktarev A.V.
, Zaikovskii V.I.
, Lapina O.B.
1H and 93Nb Solid-State NMR and IR Study of Acidity of Nanodisperse Nb2O5·nH2O
Applied Magnetic Resonance. 2019. V.50. N4. P.589-597. DOI: 10.1007/s00723-019-01118-8 WOS Scopus РИНЦ OpenAlex CAPlus
1H and 93Nb Solid-State NMR and IR Study of Acidity of Nanodisperse Nb2O5·nH2O
Applied Magnetic Resonance. 2019. V.50. N4. P.589-597. DOI: 10.1007/s00723-019-01118-8 WOS Scopus РИНЦ OpenAlex CAPlus
Даты:
| Поступила в редакцию: | 19 июл. 2018 г. |
| Принята к публикации: | 11 февр. 2019 г. |
| Опубликована online: | 28 февр. 2019 г. |
| Опубликована в печати: | 1 апр. 2019 г. |
Идентификаторы БД:
| ≡ Web of science: | WOS:000462570000008 |
| ≡ Scopus: | 2-s2.0-85062569660 |
| ≡ РИНЦ: | 38679659 |
| ≡ OpenAlex: | W2918919619 |
| ≡ Chemical Abstracts: | 2019:686738 |