Does the Zn2+ Species Introduced into H-ZSM-5 Zeolite Affect the Strength of Brønsted Acid Sites? | Sciact - CRIS-система Института катализа

Does the Zn2+ Species Introduced into H-ZSM-5 Zeolite Affect the Strength of Brønsted Acid Sites? Научная публикация

Журнал

ChemCatChem
ISSN: 1867-3880 , E-ISSN: 1867-3899

Вых. Данные

Год: 2020, Том: 12, Номер: 2, Страницы: 478-487 Страниц : 10 DOI: 10.1002/cctc.201901637

Ключевые слова

Brønsted acid sites; FTIR spectroscopy; solid-state NMR; zeolite; zinc

Авторы

Gabrienko Anton A. ^1,2 , Danilova Irina G. ¹ , Arzumanov Sergei S. ^1,2 , Freude Dieter ³ , Stepanov Alexander G. ^1,2

Организации

1	Boreskov Institute of Catalysis, Siberian Branch of the Russian Academy of Sciences, Prospekt Akademika Lavrentieva 5, Novosibirsk
2	Faculty of Natural Sciences, Department of Physical Chemistry, Novosibirsk State University, Pirogova Street 2, Novosibirsk
3	Fakultät für Physik und Geowissenschaften, Universität Leipzig, Linnéstr. 5, 04103

Информация о финансировании (2)

1	Российский фонд фундаментальных исследований	18-03-00189
2	Федеральное агентство научных организаций России	0303-2016-0003

To clarify the issue on Brønsted acidity enhancement by the presence of zinc species in H-ZSM-5 zeolite (G.D. Qi, et al., Angew. Chem.-Int. Edit. 2016 , 55 , 15826), the influence of Zn2+ cationic species, introduced into the zeolite, on the strength of Brønsted acid sites (BAS) has been analyzed by solid-state NMR and FTIR techniques using trimethylphosphine (TMP) and CO as probe molecules. Comparative analysis of the acidity for H-ZSM-5 and Zn2+/H-ZSM-5 zeolites has been performed. TMP adsorbed on both zeolite samples exhibits same signals at 6.3 and –4.5 ppm in 1 H and 31 P MAS NMR spectra, respectively, assigned to protonated TMP. FTIR spectroscopy has shown that both zeolite samples, H-ZSM-5 and Zn 2+ /H-ZSM-5, display the same red frequency shift (Δν OH…CO = –318 cm –1 ) of the O–H stretching band and the same blue frequency shift (Δν CO = +32 cm –1 ) of the CO stretching band for CO adsorption complex with BAS. The results obtained do not provide any evidence for the existence of some specific BAS with enhanced acid strength for Zn2+ -exchanged zeolite compared to the strength inherent to pure acid form zeolite. It is thus inferred the strength of BAS in H-ZSM-5 zeolite is not affected by the modification of the zeolite with Zn2+ cationic species.

Gabrienko A.A. , Danilova I.G. , Arzumanov S.S. , Freude D. , Stepanov A.G.
Does the Zn2+ Species Introduced into H-ZSM-5 Zeolite Affect the Strength of Brønsted Acid Sites?
ChemCatChem. 2020. V.12. N2. P.478-487. DOI: 10.1002/cctc.201901637 WOS Scopus РИНЦ OpenAlex CAPlusCA

Поступила в редакцию:	30 авг. 2019 г.
Принята к публикации:	23 сент. 2019 г.
Опубликована online:	31 окт. 2019 г.
Опубликована в печати:	18 янв. 2020 г.

≡ Web of science:	WOS:000508685300010
≡ Scopus:	2-s2.0-85074781925
≡ РИНЦ:	43211091
≡ OpenAlex:	W2976793929
≡ Chemical Abstracts:	2019:2068614
≡ Chemical Abstracts (print):	172:134020

≡ Scopus	19	Сбор данных от 15.02.2026
≡ РИНЦ	11	Сбор данных от 15.02.2026
≡ Web of science	17	Сбор данных от 20.02.2026
≡ OpenAlex	20	Сбор данных от 15.02.2026