H/D Exchange of Molecular Hydrogen with Brønsted Acid Sites of Zn- and Ga-Modified Zeolite BEA | Sciact - CRIS-system of Boreskov Institute of Catalysis

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

Journal

PCCP: Physical Chemistry Chemical Physics
ISSN: 1463-9076 , E-ISSN: 1463-9084

Output data

Year: 2010, Volume: 12, Number: 19, Pages: 5149-5155 Pages count : 7 DOI: 10.1039/b918648d

Tags

DENSITY-FUNCTIONAL THEORY; H-1 MAS NMR; DISSOCIATIVE ADSORPTION; PROPANE AROMATIZATION; H-BETA; ETHANE DEHYDROGENATION; DEUTERIUM EXCHANGE; PROBE MOLECULES; PROTON AFFINITY; IR SPECTROSCOPY

Authors

Gabrienko Anton A. ¹ , Arzumanov Sergei S. ¹ , Toktarev Alexander .V. ¹ , Danilova Irina G. ¹ , Freude Dieter ² , Stepanov Alexander G. ¹

Affiliations

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

Funding (1)

Russian Foundation for Basic Research

07-03-00136

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.

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 ANCAN PMID OpenAlex

Submitted:	Sep 9, 2009
Accepted:	Feb 26, 2010
Published online:	Mar 30, 2010
Published print:	May 21, 2010

Web of science:	WOS:000277359300030
Scopus:	2-s2.0-77951961175
Elibrary:	15326396
Chemical Abstracts:	2010:561634
Chemical Abstracts (print):	153:98374
PMID:	20445917
OpenAlex:	W2086679587

DB	Citing
Web of science	22
Scopus	22
Elibrary	21
OpenAlex	21