Electrocatalytic oxidation of hydrazine at overoxidized polypyrrole film modified glassy carbon electrode |
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Authors: | Mir Reza Majidi Karim Asadpour-Zeynali |
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Affiliation: | a Department of Analytical Chemistry, Faculty of Chemistry, University of Tabriz, Tabriz 51664, Iran b Faculty of Pharmacy and Drug Applied Research Center, Tabriz University of Medical Sciences, Tabriz 51664, Iran |
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Abstract: | Electrocatalytic oxidation of hydrazine (HZ) was studied on an overoxidized polypyrrole (OPPy) modified glassy carbon electrode using cyclic voltammetry and chronoamperometry techniques. The OPPy-modified glassy carbon electrode has very high catalytic ability for electrooxidation of HZ, which appeared as a reduced overpotential in a wide operational pH range of 5-10. The overall numbers of electrons involved in the catalytic oxidation of HZ, the number of electrons involved in the rate-determining and diffusion coefficient of HZ were estimated using cyclic voltammetry and chronoamperometry. It has been shown that using the OPPy-modified electrode, HZ can be determined by cyclic voltammetry and amperometry with limit of detection 36 and 3.7 μM, respectively. The results of the analysis suggest that the proposed method promises accurate results and could be employed for the routine determination of HZ. |
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Keywords: | Hydrazine Overoxidized polypyrrole Voltammetric behavior |
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