Issue 25, 2018, Issue in Progress

Synthesis and performance of solid proton conductor molybdovanadosilicic acid

Abstract

A molybdovanadosilicic acid H5SiMo11VO40·8H2O was synthesized and investigated in this work. The structure features and hydration degree of this acid were characterized by IR, UV, XRD and TG-DTA. Its proton conductivity was studied by electrochemical impedance spectroscopy (EIS). The EIS measurements demonstrated that H5SiMo11VO40·8H2O showed excellent proton conduction performance with proton conductivity reaching 5.70 × 10−3 S cm−1 at 26 °C and 70% relative humidity. So, it is a new solid high proton conductor. The conductivity enhances with the increase of temperature, and it exhibits Arrhenius behavior. The activation energy value for proton conduction is 21.4 kJ mol−1, suggesting that the proton transfer in this solid acid is dominated by Vehicle mechanism.

Graphical abstract: Synthesis and performance of solid proton conductor molybdovanadosilicic acid

Article information

Article type
Paper
Submitted
19 Mar 2018
Accepted
10 Apr 2018
First published
16 Apr 2018
This article is Open Access
Creative Commons BY license

RSC Adv., 2018,8, 13984-13988

Synthesis and performance of solid proton conductor molybdovanadosilicic acid

Z. Xie, H. Wu, Q. Wu and L. Ai, RSC Adv., 2018, 8, 13984 DOI: 10.1039/C8RA02390E

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