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Preparation, Characterization, and Electrocatalytic Properties of Cobalt Oxide and Cobalt Hexacyanoferrate Hybrid Films
Author(s) -
Chen ShenMing,
Wu MingHuei,
Thangamuthu R.
Publication year - 2008
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.200704036
Subject(s) - cobalt , quartz crystal microbalance , electrochemistry , cyclic voltammetry , inorganic chemistry , redox , electrode , electrolyte , cobalt oxide , oxide , supporting electrolyte , electrocatalyst , materials science , hydrazine (antidepressant) , chemistry , hydroxylamine , adsorption , organic chemistry , chromatography
Polynuclear mixed‐valent films of cobalt oxide and cobalt hexacyanoferrate (CoOCoHCF) have been deposited on electrode surfaces from a solution of Co 2+ and Fe(CN) 6 3− ions by repetitive potential cycling method. Simultaneous cyclic voltammetry and electrochemical quartz crystal microbalance measurements demonstrate the steady growth of modified film. The effect of type of monovalent cations as well as acidity of the supporting electrolyte on film growth and redox behavior of resulting film was investigated. In pure supporting electrolyte, electrochemical responses of modified electrode resemble with that of a surface immobilized redox couple. The hybrid film electrodes showed electrocatalytic activity toward oxidation of NADH, hydrazine and hydroxylamine. The feasibility of using our modified electrodes for analytical application was also explored.