Abstract
Cyclic voltammetric studies have been conducted in order to develop a suitable method for characterizing the performance of sintered porous iron electrodes in 5.35 M KOH with 0.65 M LiOH solution. The separation of peak potential ( ΔE p) and the ratio of cathodic to anodic charges ( Q c/ Q a) of the Fe/Fe(II) and Fe(II)/Fe(III) couples at zero sweep rates are used to evaluate the reversibility of the porous iron and iron-sulfur electrodes. The influence of additives to the solution (i.e., 0.05 M thiourea, 0.025 M ethylenediaminetetraacetic acid (EDTA), 0.01 M hexamine and 0.01 M Na 2S) on the electrode reversibility is also examined.
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