Enhanced proton conductivity of Mo154-based porous inorganic framework

The construction of inorganic porous frameworks from discrete polyoxometalate (POM) units is a major research challenge. Herein, a three-dimensional (3D) all-inorganic porous structure {Mo-154}(n) that consists of classic Mo-154 rings connected by Mo-O-Mo covalent bonds was synthesized. Interestingly, the proton conductivity of the 3D-{Mo-154}(n) framework is 1.1x10(-2) S cm(-1) at 22 degrees C and 100% relative humidity (RH), which is one of the highest proton conductivities reported thus far for POM-based conductive materials. Compared to the discrete {Mo-154} cluster and 1D-{Mo-154}(n), the enhanced conductivity of 3D-{Mo-154}(n) suggests that assembling POM-based all-inorganic porous frameworks is a promising method for designing proton-conductive materials.

Automated summary

The study synthesized a three-dimensional all-inorganic porous structure composed of Mo-154 rings, demonstrating one of the highest reported proton conductivities for POM-based conductive materials. These results suggest that assembling POM-based all-inorganic porous frameworks is a promising approach for designing proton-conductive materials.