Fullerene film electrodes in aqueous solutions

摘要

Solution-cast C_60 films on gold and glassy carbon substrates can be reduced electrochemically in aqueous solutions producing an electron-conducting cation exchanger material. These films remain active even on exposure to air; their activity decreases measurably only after several hous due to some partial oxidation by oxygen. However, they can be converted irreversibly to an insualtor form by electrochemcial oxidation starting from about 600 mV versus SHE. Below this potential limit the reduced C_60 films can be used as electrode materials, and their specific behaviour is demonstrated with some test compounds.