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Electrocatalytic Determination of Traces of Hydrazine by a Glassy Carbon Electrode Modified with Palladium‐Gold Nanoparticles
Author(s) -
Shamsipur Mojtaba,
Karimi Ziba,
Tabrizi Mahmoud Amouzadeh,
Shamsipur Ali
Publication year - 2014
Publication title -
electroanalysis
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.574
H-Index - 128
eISSN - 1521-4109
pISSN - 1040-0397
DOI - 10.1002/elan.201400187
Subject(s) - hydrazine (antidepressant) , overpotential , amperometry , palladium , detection limit , electrode , inorganic chemistry , colloidal gold , selectivity , electrochemistry , glassy carbon , chemistry , nanoparticle , materials science , nuclear chemistry , catalysis , cyclic voltammetry , chromatography , nanotechnology , organic chemistry
A glassy carbon electrode modified with palladium/gold nanoparticles was successfully prepared by an electrodeposition process. It efficiently oxidizes hydrazine at a low overpotential of −0.26 V versus SCE. The Pd‐AuNPs with an average size of 50–80 nm are uniformly dispersed at the GCE. The Pd‐AuNPs/GCE was used for determination of hydrazine in phosphate buffer solution of pH 7.0. The amperometric current response of the electrode was increased linearly over a hydrazine concentration of 0.1–500 µM with a limit of detection of 0.07 µM .The prepared hydrazine sensor exhibited high sensitivity, good selectivity reproducibility and long term stability.