Characterization and Dynamics of the Different Protonic Species in Hydrated 12-Tungstophosphoric Acid Studied by 2H NMR | Sciact - CRIS-система Института катализа

Characterization and Dynamics of the Different Protonic Species in Hydrated 12-Tungstophosphoric Acid Studied by 2H NMR Научная публикация

Журнал

The Journal of Physical Chemistry C
ISSN: 1932-7447 , E-ISSN: 1932-7455

Вых. Данные

Год: 2014, Том: 118, Номер: 51, Страницы: 30023-30033 Страниц : 11 DOI: 10.1021/jp510410k

Ключевые слова

Catalysis; Ions; Molecules

Авторы

Kolokolov Daniil I. ^1,2 , Kazantsev Maxim S. ¹ , Luzgin Mikhail V. ^1,2 , Jobic Herve 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 630090, Russia
2	Faculty of Natural Sciences, Department of Physical Chemistry, Novosibirsk State University, Pirogova Street 2, Novosibirsk 630090, Russia
3	Institut de Recherches sur la Catalyse et l’Environnement de Lyon, Universitéde Lyon 1, CNRS, 2. Av. A. Einstein, 69626 Villeurbanne, France

Информация о финансировании (1)

Российский фонд фундаментальных исследований

12-03-31108

Solid heteropolyacids (HPAs) are promising nonpolluting superacids used as catalysts and solid proton conductors. The catalytic and conducting properties of HPAs are very sensitive to the amount of hydration water present in the system, as water molecules tend to interact with the HPA acid protons to form [H3O]+ and [H5O2]+ ions. These ions constitute active species that govern the catalytic reaction pathways and the proton migration mechanism. Establishing the structure and mobility of protonic species could yield important information concerning the functions of material based on HPA hydrates. In this work, we have performed the analysis of both 2H NMR line shape and the evolution of T1, T2 relaxation with temperature for the deuterated analogue of the solid 12-tungstophosphoric acid (TPA × nH2O) at different hydration levels (0 < n < 6) in the wide temperature range of 103–503 K. This allowed us to characterize in detail the mobility of different protonic species, including acidic OH groups, water molecules, and hydroxonium ions. Kinetic parameters of internal and diffusional motions for different protonic species at different hydration levels n of TPA × nH2O were derived.

Kolokolov D.I. , Kazantsev M.S. , Luzgin M.V. , Jobic H. , Stepanov A.G.
Characterization and Dynamics of the Different Protonic Species in Hydrated 12-Tungstophosphoric Acid Studied by 2H NMR
The Journal of Physical Chemistry C. 2014. V.118. N51. P.30023-30033. DOI: 10.1021/jp510410k WOS Scopus РИНЦ CAPlusCA OpenAlex

Поступила в редакцию:	16 окт. 2014 г.
Принята к публикации:	25 нояб. 2014 г.
Опубликована online:	11 дек. 2014 г.
Опубликована в печати:	26 дек. 2014 г.

Web of science:	WOS:000347360200064
Scopus:	2-s2.0-84920059252
РИНЦ:	24026317
Chemical Abstracts:	2014:2011691
Chemical Abstracts (print):	162:114660
OpenAlex:	W2326229220

БД	Цитирований
Web of science	24
Scopus	26
РИНЦ	25
OpenAlex	25