Studies of Zn|ZnX2|polyaniline batteries. II. X=I

Flow Injection Analysis of Iodate Reduction on PEDOT Modified Electrode

“…Biallozor et al [57] studied PEDOT behavior in I À /I 2 solution and they concluded that charge-transfer complexes between I 2 and PEDOTwere formed. Moreover, Mengoli et al [58] and Tang et al [59] were examined Pt/ PANI behavior in I À /I 2 solution and nature of interaction was found to be charge transfer complexes and it was confirmed by XPS method. The above literature evidence allowed us to conclude the nature of interaction between iodate and PEDOT was charge transfer complex.…”

Electrooxidation of Iodide Ion at Poly 8-(3-acetylimino-6-methyl-2,4- dioxopyran)-1-aminonaphthalene Modified Electrode in Aqueous Solution

“…16 The above results agree with that in literature, so precipitation-dissolution mechanism for the oxidation process at bare Pt electrode is still valid at PAMDAN /Pt modified electrodes. [13][14][15][16][17] For thicker film (20 scans), as shown in Figure 6, the 1 st oxidation peak disappears and only the 2 nd one appears at 0.58 V with decrease in its current. The broad cathodic peak appears at 0.28 V with some shoulders in it.…”

“…This is due to the presence of thick PAMDAN film on Pt electrode which hinders the diffusion of iodide ions to be oxidized at Pt surface. [13][14][15][16][17][21][22][23][24] It was found that the iodide ion concentration affects the redox response of the oxidation process. Figure 7 shows the cyclic voltamograms of the 0.01 M and 0.05 M KI.…”

“…Also it was found that the I 3 -/I -reaction takes place throughout the film and not at the metal-polymer interface. 17 On the external surface of the polymer film, a layer of iodine is deposited during an anodic scan.These reaction sites at the external surface of the polymer film for the reduction of iodine species are assigned as the primary reaction sites, where the electrode reaction takes place, as on the bare Pt electrode. On the other hand, the bulk of the polymer film is considered as having a porous nature (e.g.…”

“…Detailed studies on the formation, thickness, properties, growth and dissolution of the iodine film during the anodic oxidation of iodide have been performed. [13][14][15][16][17] Anodic oxidation of iodide is consecutive process; it consists of a series of elementary steps, such as the diffusion of iodide to the electrode, the discharge of iodide ions at the electrode, the complexing of the product iodine with I -(and I 3 -, etc. ), and the diffusion of iodine species from the electrode surface to the bulk solution.…”