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Kinetic Study of the Electro‐Catalytic Oxidation of Hydrazine on Cobalt Hydroxide Modified Glassy Carbon Electrode
Author(s) -
HASANZADEH Mohammad,
KARIMNEZHAD Ghasem,
SHADJOU Nasrin,
KHALILZADEH Balal,
SAGHATFOROUSH Lotali,
ERSHAD Sohrab,
KAZEMAN Isa.
Publication year - 2009
Publication title -
chinese journal of chemistry
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.28
H-Index - 41
eISSN - 1614-7065
pISSN - 1001-604X
DOI - 10.1002/cjoc.200990104
Subject(s) - chemistry , chronoamperometry , cyclic voltammetry , hydrazine (antidepressant) , inorganic chemistry , cobalt hydroxide , cobalt , hydroxide , electrochemistry , redox , glassy carbon , catalysis , electrocatalyst , voltammetry , electrode , organic chemistry , chromatography
Abstract Electrocatalytic oxidation of hydrazine was investigated on a cobalt hydroxide modified glassy carbon (CHM‐GC) electrode in alkaline solution. The process of oxidation involved and its kinetics were established by using cyclic voltammetry, chronoamperometry techniques as well as steady state polarization measurements. In cyclic voltammetry (CV) studies, in the presence of hydrazine the peak current increase of the oxidation of cobalt hydroxide is followed by a decrease in the corresponding cathodic current. This indicates that hydrazine is oxidized on the redox mediator that is immobilized on the electrode surface via an electrocatalytic mechanism. A mechanism based on the electrochemical generation of Co(IV) active sites and their subsequent consumption by the hydrazine in question was also investigated.