Exceptionally Stable H3PO4@MIL-100 System: A Correlation between Proton Conduction and Water Adsorption Properties

Exceptionally Stable H3PO4@MIL-100 System: A Correlation between Proton Conduction and Water Adsorption Properties Full article

Journal

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

Output data

Year: 2020, Volume: 124, Number: 42, Pages: 23143-23149 Pages count : 7 DOI: 10.1021/acs.jpcc.0c06407

Authors

Ponomareva Valentina G. ¹ , Cheplakova Anastasia M. ^2,3 , Kovalenko Konstantin A. ^2,3 , Fedin Vladimir P. ^2,3

Affiliations

1	Institute of Solid State Chemistry and Mechanochemistry SB RAS, 18 Kutateladze St., 630128 Novosibirsk, Russian Federation
2	Nikolaev Institute of Inorganic Chemistry SB RAS, 3 Akad. Lavrentiev Ave., 630090 Novosibirsk, Russian Federation
3	Novosibirsk State University, 2 Pirogova St., 630090 Novosibirsk, Russian Federation

A proton-conducting H3PO4@MIL-100 inclusion compound was synthesized by incorporating phosphoric acid into a mesoporous chromium(III) trimesate MIL-100 metal-organic framework. The concentration of phosphoric acid in the hybrid system was determined in a wide range of relative humidity using the water vapor sorption measurements of H3PO4@MIL-100. The hybrid compound demonstrates high thermal stability, and the framework retains its original crystal structure as confirmed by Xray powder diffraction and thermogravimetric analysis (TGA) measurements. The proton conductivity at 70 °C and moisture of 5 mol % H2O is 3.0 × 10-2 S·cm-1, which is only 1 order of magnitude lower than that of aqueous phosphoric acid. Importantly, the proton conductivity in a wide range of relative humidity is fully compliant with water content and calculated phosphoric acid concentration in the sample determined by TGA and water vapor sorption measurements. The mechanism of proton conductivity in H3PO4@MIL-100 hybrid compound is discussed.

Ponomareva V.G. , Cheplakova A.M. , Kovalenko K.A. , Fedin V.P.
Exceptionally Stable H3PO4@MIL-100 System: A Correlation between Proton Conduction and Water Adsorption Properties
Journal of Physical Chemistry C. 2020. V.124. N42. P.23143-23149. DOI: 10.1021/acs.jpcc.0c06407 Scopus OpenAlex

Scopus:	2-s2.0-85094913585
OpenAlex:	W3094317224

DB	Citing
Scopus	11
OpenAlex	10