Determination of hydrazine by polyNi(II) complex modified electrodes with a wide linear calibration range

作者：Azad Uday Pratap; Ganesan Vellaichamy^*

来源：Electrochimica Acta, 2011, 56(16): 5766-5770.

DOI：10.1016/j.electacta.2011.04.051

• Chemically modified electrodes
• Electropolymerization
• Nafion
• Hydrazine oxidation
• Electrocatalysis

Polymeric [Ni(11)(teta)](2+) (poly(Ni); teta =C-meso-(5,5,7,12,12,14-hexamethyl-1,4,8,11-tetra-azacyclotetradecane)) modified glassy carbon and Nafion (NO-coated glassy carbon electrodes (GC/poly(Ni) and GC/Nf/poly(Ni), respectively) were used for the efficient electrocatalytic oxidation of hydrazine (HZ) in 0.1 M NaOH. The catalytic currents were proportional to the concentration of HZ with a wide linear calibration range (LCR). GC/poly(Ni) had a LCR from 1.0 mu M to 10.0 mM, whereas that of GC/Nf/poly(Ni) ranged from 1.0 mu M to 100.0 mM. The latter is the widest LCR reported to date. The presence of the Nf film (i.e., in GC/Nf/poly(Ni)) not only increased the stability of the poly(Ni) film but also widened the LCR. The electrocatalytic oxidation of HZ obeyed first-order kinetics with respect to HZ concentration. The kinetic parameters were investigated by cyclic voltammetry and chronoamperometry.

• 出版日期2011-6-30