Abstract
Equations are presented describing the potential-time dependence of the reversible reoxidation of a soluble or insoluble product at an inert electrode, using current reversal chronopotentiometry. These relationships are applicable to cases where the current is reversed at any time before the forward transition time, and for any ratio of the reverse to forward current density. The case of a higher order reaction is also treated. Experimental verification is presented for the three different relationships by appropriate reactions in molten salt systems. The oxidation of chromium(II) to chromium(III) in KCl + LiCl eutectic was examined as an3 example of a soluble product formed at the electrode; the deposition of lead from PbCl 2 in molten LiCl + KCl eutectic was studied as an example of an insoluble product, and the oxidation 3 of Hg 2 2+ in basic AlCl 3 + NaCl was used to illustrate a higher order electron transfer reaction.3
Published Version
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