Role of Iron Impurities in Formation of Electron-accepting Sites in H-ZSM-5 Zeolites : 15N Nuclear Magnetic Resonance and 15N Nuclear Magnetic Relaxation of Adsorbed N2 and N2O
Научная публикация
| Общее |
Язык:
Английский,
Жанр:
Статья (Full article),
Статус опубликования:
Опубликована,
Оригинальность:
Оригинальная
|
| Журнал |
Journal of the Chemical Society - Faraday Transactions (1990-1998, in 1999 become Physical Chemistry Chemical Physics)
ISSN: 0956-5000
|
| Вых. Данные |
Год: 1991,
Том: 87,
Номер: 14,
Страницы: 2247-2252
Страниц
: 6
DOI:
10.1039/FT9918702247
|
| Ключевые слова |
HETEROGENEOUS CATALYSTS; GAMMA-ALUMINA; ACID SITES; NMR; C-13; SPECTROSCOPY; MOLECULES; PYRIDINE; ZSM-5 |
| Авторы |
Mastikhin V.M.
1
,
Filimonova S.V.
1
,
Mudrakovsky I.L.
1
,
Romannikov V.N.
1
|
| Организации |
| 1 |
Institute of Catalysis, Novosibirsk 630090, USSR
|
|
15 N NMR chemical shifts of N2 and N2O molecules as well as 15N relaxation rates of N2O adsorbed on a series of H-ZSM-5 zeolites, H-Y zeolite, SiO2 and γ-Al2O3 containing controlled quantities of iron impurities have been studied. Unlike the SiO2, γ-Al2O3 and H-Y samples, the H-ZSM-5 zeolites have strong electron-accepting sites formed by Fe3+ and probably Al3+ cations. The possible structure of acidic sites and the geometry of the complexes formed during N2O adsorption are discussed.