Abstract: The electrochemical behavior of Fe³⁺/Fe²⁺system and ferricyanide ion were investigated by cyclic voltammetry, linear sweep voltammetry, and chronoamperometry in the super gravity field. The results show that diffusion coefficient of ferricyanide ion increased in the super gravity field, and diffusion coefficient under gravity coefficient 125 is almost two times of that in the natural gravity field. The peaks of oxidation and the reduction of Fe³⁺/Fe²⁺ disappeared gradually with the increase of the gravity coefficients, and the limiting current densities appeared at 0.10 and 0.80 V(vs. SCE), with increasing super gravity coefficients. When G=30, the limiting current density is 0.100 A/cm² at 0.10 V, while it is up to 0.196 A/cm² under G=280.

Key words: Super gravity field, Ion diffusion, Equilibrium electrode potential, Electrochemical behavior