Electrochemical Behavior of Ni(II)-Salen at the Mercury Electrode

The complex Ni(II)-salen has been studied using cyclic and square-wave cathodic stripping voltammetry at the static mercury drop electrode in an aqueous media of phosphate and Hepes buffers (at pH 7.0). The resulting voltammograms consist of a totally irreversible one-electron transfer attributable...

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Bibliographic Details
Published in:International journal of electrochemistry 2013-01, Vol.2013 (2013), p.1-7
Main Authors: Mardini Farias, Pércio Augusto, Rodrigues Bastos, Margarida Bethlem
Format: Article
Language:English
Subjects:
Analytical chemistry
Buffers
Carbon
Deoxyribonucleic acid
DNA
Electrodes
Nickel
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Summary:The complex Ni(II)-salen has been studied using cyclic and square-wave cathodic stripping voltammetry at the static mercury drop electrode in an aqueous media of phosphate and Hepes buffers (at pH 7.0). The resulting voltammograms consist of a totally irreversible one-electron transfer attributable to the coupling of Ni(II) salen/Ni(I) salen via an EC mechanism. The mean value for the transfer coefficient α in both supporting electrolytes was calculated as 0.35 ± 0.05. The amount of reactant adsorbed after 60 s of accumulation at −700 mV was calculated to be 2.8 × 10−8 mol·cm−2. The detection limit for nickel determination was found to be 3.4 × 10−9 mol L−1.
ISSN:2090-3529
2090-3537
DOI:10.1155/2013/257926