Abstract:

This paper studies the electrochemical behavior of ferrocene in the ScCO₂/BMIMPF₆ biphasic system using cyclic voltammetry on a platinum disk micro-electrode. The diffusion coefficient of ferrocene under different pressure conditions is determined. The results show that the redox reaction of ferrocene in ScCO₂/BMIMPF₆ biphasic system is quasi-reversible, and the electrode process is controlled by diffusion. Moreover, addition of CO₂ has effects on both mass transfer process in electrode reaction and electron exchange process on the electrode surface.

Key words: ferrocene; ScCO₂; ionic liquid; biphasic system; electrochemical behavior