Back to Search
Start Over
Synthesis and high proton conductive performance of a quaternary vanadomolybdotungstosilicic heteropoly acid.
- Source :
- Dalton Transactions: An International Journal of Inorganic Chemistry; 9/28/2016, Vol. 45 Issue 36, p14238-14242, 5p
- Publication Year :
- 2016
-
Abstract
- A new vanadium and molybdenum-substituted quaternary silicon-containing heteropoly acid H<subscript>6</subscript>SiW<subscript>9</subscript>MoV<subscript>2</subscript>O<subscript>40</subscript>·15H<subscript>2</subscript>O has been synthesized in this paper by the stepwise acidification and the stepwise addition of elemental solutions. The structural feature and hydration of this product were characterized by IR, UV, XRD and TG-DTA, and its proton conductivity was measured by electrochemical impedance spectroscopy (EIS). The result of EIS shows that H<subscript>6</subscript>SiW<subscript>9</subscript>MoV<subscript>2</subscript>O<subscript>40</subscript>·15H<subscript>2</subscript>O is a solid high-proton conductor with a conductivity of 6.01 × 10<superscript>−3</superscript> S cm<superscript>−1</superscript> at 22 °C and 80% relative humidity, which increases at higher temperatures. Its conductive activation energy is 27.5 kJ mol<superscript>−1</superscript>, which suggests that the mechanism of proton conduction is dominated by the vehicle mechanism. [ABSTRACT FROM AUTHOR]
Details
- Language :
- English
- ISSN :
- 14779226
- Volume :
- 45
- Issue :
- 36
- Database :
- Complementary Index
- Journal :
- Dalton Transactions: An International Journal of Inorganic Chemistry
- Publication Type :
- Academic Journal
- Accession number :
- 118043605
- Full Text :
- https://doi.org/10.1039/c6dt02727j