Kinetics of Electrochemical Reductive Dissolution of Iron(III) Hydroxy-oxides

Abrasive stripping voltammetry was applied to the chronoamperometric and voltammetric investigation of the kinetics of reductive dissolution of synthetic and natural iron(III) hydroxy-oxides. Conditions were found under which the dissolution process can be described by equations derived for and applied to the surface reaction of the particles. The rate constants obtained were employed to compare the electrochemical and chemical reductive dissolution and to quantitatively evaluate the effect of adsorbing ions, pH, and working electrode potential.