Role of acidity on the electrochemistry of Prussian Blue at plain and Nation filmcoated electrodes |
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Authors: | S Abraham John and R Ramaraj |
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Institution: | (1) School of Chemistry, Madurai Kamaraj University, 625021 Madurai, India |
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Abstract: | Prussian Blue (PB) coated on plain platinum (Pt) shows a redox wave at 0.44V vs SCE in addition to the two usual redox waves
at 0.82 and 0.12 V vs SCE when the electrodes were dipped in acidic KC1 solution. PB incorporated into Nation film-coated
on Pt electrode exhibited the same behaviour even in the presence of neutral KG solution. In acidic KC1, the additional redox
wave observed for PB incorporated into Nation film shifted positively to 0.39V vs SCE and the peak separation was reduced
to 30mV. The observed additional redox wave for PB coated on plain Pt electrode and incorporated into Nafion film-coated Pt
electrodes was assigned to the partial reduction of PB occurring due to the insertion of protons into the film. The effect
of various cations on the electrochemistry of PB incorporated into Nafion film-coated electrode was also studied. |
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Keywords: | Prussian Blue Nafion film modified electrodes |
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