Sciact
  • EN
  • RU

H/D Exchange of Molecular Hydrogen with Brønsted Acid Sites of Zn- and Ga-Modified Zeolite BEA Научная публикация

Журнал PCCP: Physical Chemistry Chemical Physics
ISSN: 1463-9076 , E-ISSN: 1463-9084
Вых. Данные Год: 2010, Том: 12, Номер: 19, Страницы: 5149-5155 Страниц : 7 DOI: 10.1039/b918648d
Ключевые слова DENSITY-FUNCTIONAL THEORY; H-1 MAS NMR; DISSOCIATIVE ADSORPTION; PROPANE AROMATIZATION; H-BETA; ETHANE DEHYDROGENATION; DEUTERIUM EXCHANGE; PROBE MOLECULES; PROTON AFFINITY; IR SPECTROSCOPY
Авторы Gabrienko Anton A. 1 , Arzumanov Sergei S. 1 , Toktarev Alexander .V. 1 , Danilova Irina G. 1 , Freude Dieter 2 , Stepanov Alexander G. 1
Организации
1 Boreskov Institute of Catalysis, Siberian Branch of the Russian Academy of Sciences, Prospekt Akademika Lavrentieva 5, Novosibirsk 630090, Russia
2 Abteilung Grenzflachenphysik, Universitat Leipzig, Linnestraße 5, 04103 Leipzig, Germany

Информация о финансировании (1)

1 Российский фонд фундаментальных исследований 07-03-00136

Реферат: Kinetics of hydrogen H/D exchange between Brønsted acid sites of pure acid-form and Zn- or Ga-modified zeolites beta (BEA) and deuterated hydrogen (D(2)) has been studied by (1)H MAS NMR spectroscopy in situ within the temperature range of 383-548 K. A remarkable increase of the rate of the H/D exchange has been found for Zn- and Ga-modified zeolites compared to the pure acid-form zeolite. The rate of exchange for Zn-modified zeolite is one order of magnitude higher compared to the rate for Ga-modified zeolite and two orders of magnitude larger compared to the pure acid-form zeolite. This promoting effect of metal on the rate of H/D exchange was rationalized by a preliminary dissociative adsorption of molecular hydrogen on metal oxide species or metal cations. The adsorbed hydrogen is further involved in the exchange with the acid OH groups located in vicinity of metal species. The role of different metal species in the possible mechanisms of the exchange with involvement of zeolite Brønsted acid sites and metal species is discussed.
Библиографическая ссылка: Gabrienko A.A. , Arzumanov S.S. , Toktarev A.V. , Danilova I.G. , Freude D. , Stepanov A.G.
H/D Exchange of Molecular Hydrogen with Brønsted Acid Sites of Zn- and Ga-Modified Zeolite BEA
PCCP: Physical Chemistry Chemical Physics. 2010. V.12. N19. P.5149-5155. DOI: 10.1039/b918648d WOS Scopus РИНЦ CAPlusCA PMID OpenAlex
Даты:
Поступила в редакцию: 9 сент. 2009 г.
Принята к публикации: 26 февр. 2010 г.
Опубликована online: 30 мар. 2010 г.
Опубликована в печати: 21 мая 2010 г.
Идентификаторы БД:
Web of science: WOS:000277359300030
Scopus: 2-s2.0-77951961175
РИНЦ: 15326396
Chemical Abstracts: 2010:561634
Chemical Abstracts (print): 153:98374
PMID (PubMed): 20445917
OpenAlex: W2086679587
Цитирование в БД:
БД Цитирований
Web of science 22
Scopus 22
РИНЦ 20
OpenAlex 21
Альметрики: