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Electrocatalytic Oxidation of Hydrogen Peroxide by Poly(NiIIteta) modified Electrodes§

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Abstract

[NiII(teta)]2+ (teta=C-meso-(5,5,7,12,12,14-hexamethyl-1,4,8,11-tetraazacyclotetradecane) was electropolymerized on glassy carbon (GC) and Nafion® coated GC electrodes (GC/Nf). These poly(NiIIteta) modified electrodes showed 70 mV shift per pH unit and electrocatalysed the oxidation of H2O2. The thickness of the Nafion® film was found to influence the rate of the electrocatalytic reaction. A rate constant of 1.77 × 103 dm3 mol−1 s−1 was observed at 1.0 × 10−5 cm thick Nafion® film, whereas a rate constant of 0.08 × 103 dm3 mol−1 s−1 was observed at 3.6 × 10−5 cm thick film. At a plain GC electrode, a rate constant of 1.29 × 103 dm3 mol−1 s−1 was observed. The poly(NiIIteta) is stabilized in the Nafion® film when compared to the poly(NiIIteta) coated on plain electrode.

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Authors and Affiliations

  1. School of Chemistry, Madurai Kamaraj University, Madurai, 625 021, India

    V. Ganesan & R. Ramaraj

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  1. V. Ganesan
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  2. R. Ramaraj
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Correspondence to R. Ramaraj.

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Ganesan, V., Ramaraj, R. Electrocatalytic Oxidation of Hydrogen Peroxide by Poly(NiIIteta) modified Electrodes§. Journal of Applied Electrochemistry 31, 585–590 (2001). https://doi.org/10.1023/A:1017574817660

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