Journal
ELECTROCHIMICA ACTA
Volume 52, Issue 21, Pages 6248-6253Publisher
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.electacta.2007.04.019
Keywords
hydrazine; overoxidized polypyrrole; voltammetric behavior
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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 mu M, respectively. The results of the analysis suggest that the proposed method promises accurate results and could be employed for the routine determination of HZ. (c) 2007 Elsevier Ltd. All rights reserved.
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