Solid-state electrochemistry: voltammetric monitoring of redox transitions in single crystals of silicotungstic acid

The authors have shown that electrochemical methodology can be extended to the investigation of the protonically conducting, crystalline mixed-valence molecular materials. Such studies provide information about thermodynamics and kinetics of redox processes in these materials. Additional results, with thin films and powders of silicotungstic acid and related oxide systems, clearly suggest that solid-state electrochemical responses are very sensitive to the degree of hydration, which probably controls the protonic mobility. They have been able to perform useful solid-state electrochemical measurements on other powdered materials, including Prussian blue analogues and metalloproteins, by essentially the same methodology.