Preparation and conductivity of solid high-proton conductor silica gel containing 80 wt.% decatungstodivanadogermanic acid

The silica gel containing decatungstodivanadogermanic heteropoly acid was prepared by means of the sol-gel method. Infrared spectrum and XRD pattern revealed that the Keggin structure characteristic of GeW₁₀V₂O₄₀⁶⁻ anion was present in the silica gel skeleton. The regularity of the change of the characteristic peaks in the infrared spectrum was investigated. The silica gel exhibited considerably high-proton conductivity. The proton conductivity of the gel containing 80 wt.% decatungstodivanadogermanic acid is 5.37 × 10^− 2 S cm^− 1 at room temperature (18 °C).