Abstract
A new solid high-proton conductor molybdotungstovanadogermanic heteropoly acid H 5GeW 9Mo 2VO 40·22H 2O has been prepared for the first time by the stepwise acidification and the stepwise addition of solutions of the component elements. The product was characterized by chemical analysis, potentiometric titration, IR, UV, XRD and TG-DTA. The results of AC impedance measurement show that its proton conductivity at 18°C is 2.79×10 −4 S cm −1 and the activation energy for proton conduction is 35.64 kJ/mol.
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