Faradaic impedance measurements of the ferrous/ferric citrate system

Abstract

An examination of the ferrous/ferric citrate system has been made by the faradaic impedance technique. Determination of the reaction mechanism by the dependence of the rate on concentration has been attempted. The results have proved ambiguous in deciding whether the rate is controlled chemically or by the electron transfer stage. In addition, the negative dependence of the rate on iron(II) concentration has proved difficult to account for and a mechanism involving iron(IV) has been tentatively proposed.