Rb5H7(PO4)4 as a New Example of the Superprotonic Conductor | Sciact - CRIS-system of Boreskov Institute of Catalysis

Rb5H7(PO4)4 as a New Example of the Superprotonic Conductor Full article

Journal

Ionics
ISSN: 0947-7047 , E-ISSN: 1862-0760

Output data

Year: 2019, Volume: 25, Number: 2, Pages: 551-557 Pages count : 7 DOI: 10.1007/s11581-018-2833-7

Tags

Ac-impedance spectroscopy; Proton conductivity; Rb 5 H 7 (PO 4 ) 4; Superprotonic conductors; Thermal analysis

Authors

Gaydamaka Anna A. ^1,2 , Ponomareva Valentina G. ^1,2 , Bagryantseva Irina N. ^1,2

Affiliations

1	Institute of Solid State Chemistry and Mechanochemistry, Siberian Branch of the Russian Academy of Sciences
2	Novosibirsk State University

Thermal and transport properties, as well as spectral characteristics of Rb5H7(PO4)4, have been investigated by several methods. It was shown that Rb5H7(PO4)4 undergoes a reversible phase transition at Tp ~ 237 °С. However, the interval of the high-temperature phase stability is quite narrow, about 15 °С. The initial dehydration event in Rb5H7(PO4)4 occurs at 200 °С. The conductivity measurements were performed under highly humidified conditions (PH2O ≈ 0.56 atm.) to suppress dehydration of the title salt. The phase transition leads to the sharp increase of proton conductivity up to 10−2 S/cm. The reverse transition goes slowly with significant hysteresis on cooling. Thus, the superprotonic conductivity of Rb5H7(PO4)4 was determined. The possibility of superionic phase stabilization by humidification was shown. The IR- and Raman spectra have been recorded at room temperature and discussed in relation to the crystal structure.

Gaydamaka A.A. , Ponomareva V.G. , Bagryantseva I.N.
Rb5H7(PO4)4 as a New Example of the Superprotonic Conductor
Ionics. 2019. V.25. N2. P.551-557. DOI: 10.1007/s11581-018-2833-7 WOS Scopus РИНЦ AN OpenAlex

Submitted:	Nov 17, 2018
Accepted:	Dec 6, 2018
Published online:	Dec 18, 2018
Published print:	Feb 1, 2019

Web of science:	WOS:000457774500018
Scopus:	2-s2.0-85058849130
Elibrary:	38641547
Chemical Abstracts:	2018:2551469
OpenAlex:	W2905025753

DB	Citing
Web of science	6
Scopus	4
OpenAlex	5