Affiliation:
1. Electrochemistry Research Group Department of Applied Science Dundalk Institute of Technology Dublin Road Dundalk County Louth Ireland
2. Department of Marine Resource Science Faculty of Agriculture and Marine Science Kochi University Nankoku 783-8502 Japan
3. Marine Core Research Institute Kochi University Nankoku 783-8502 Japan
4. MEDi Center Kochi University Kochi 780-0842 Japan
Abstract
AbstractKeggin‐type polyoxometalates (POMs), (n‐Bu4N)4[AsVMo11O40] (AsVMo11) and (n‐Bu4N)4H[AsV2Mo10O40] (AsV2Mo10), have been immobilised with the conducting polymer poly (3,4‐ethylenedioxythiophene) (PEDOT) on the surface of the glassy carbon electrode via chronocoulometry technique. The voltammetric behaviour of these modified electrodes was investigated with cyclic voltammetry and electrochemical quartz crystal microbalance (EQCM). The resulting films showed the surface adsorbed behaviour and dependence on the pH of the electrolyte solution. By using AC impedance, it was found that the resulting POM‐doped PEDOT films were highly conductive. The redox switching stability of the polymer films was investigated, and it was found that the AsVMo11/PEDOT hybrid film is significantly more stable for continuous potential sweep than the AsV2Mo10/PEDOT hybrid film. Additionally, the EQCM measurements confirm that during the redox potential cycling, the anions in the supporting electrolyte replace the POMs anion doped onto the film.
Funder
Takahashi Industrial and Economic Research Foundation