THE CATHODIC AND ANODIC BEHAVIOR OF COPPER IN N,N-DIMETHYLFORMAMIDE WATER MIXTURES

The cathodic and anodic behaviours of copper were investigated in diff erent N,N-dimethylformamide (DMF)-water mixtures. Oxygen reduction and the reduction of the water are found to occur consecutively at the co pper cathode. The onset potential for water reduction reaction showed dependence on the solvent composition and has been explained in terms of the changes in viscosity and of the accompanying solution structure . The anodic polarization curves of copper differed in each solvent co mposition and the behaviour is tried to be understood in terms of sele ctive solvation of metal ions. The results obtained under various expe rimental conditions like deaeration and temperature variation showed l imiting nature of the current and oxygen reduction can be diffusion co ntrolled process in cathodic region.