Preparation, Characterization and Conductivity of Solid High-proton Conductor Na7CoW_(11)O_(39)Cd(H_2O)·12H_2O

摘要

A new solid high-proton conductor Na_7[CoW_(11)O_(39)Cd(H_2O)]·12H_2O has been synthesized for the first time. The percentage composition of the product were determined by Inductively coupled plasma (ICP) and X-ray photoelectron spectroscopy (XPS). The product was characterized by infrared spectroscopy (IR) and X-ray diffraction (XRD), which indicate it possesses the Keggin structure. The TG-DTA curve shows the sequence of water loss in the compound, the amount of the loss, as well as the thermostability. Conductivity of the compound was investigated by four-electrode method at room temperature and different measuring temperatures, the results reveal that its proton conductivity is 4.87×10~(-4) S·cm~(-1) at 27°C and the activation energy for proton conduction is 15.31 kJ/mol.