Synthesis and conductive performance about a kind of high-proton conductor, Dawson structure heteropoly acid H6P2W16Mo2O40 ⋅ 29H2O

A heteropoly acid (HPA) with Dawson structure, H 6 P 2 W 1 6 Mo 2 O 4 0 ⋅29H 2 O, is synthesized with characterization and the investigation toward its proton conductive behavior. Actually, at 18 ∘ C with 80% relative humidity (RH), H 6 P 2 W 1 6 Mo 2 O 4 0 ⋅ 29H 2 O displays the conductivity as 2.30 × 10 − 3 S ⋅ cm − 1 , indicating an excellent protonic conductor. The proton conduction activation energy is 32.19 kJ ⋅ mol − 1 , implying proton migration following vehicle mechanism. During the measured range, higher temperature can boost the conductivity.