Electro-oxidation of hydrazine at electrodes modified with polymeric cobalt phthalocyanine

✍ Scribed by Qi-Yuan Peng; Thomas F. Guarr

• Publisher: Elsevier Science
• Year: 1994
• Tongue: English
• Weight: 301 KB
• Volume: 39
• Category: Article
• ISSN: 0013-4686
• DOI: 10.1016/0013-4686(94)00228-2

✦ Synopsis

The electrocatalytic oxidation of hydrazine in basic solution at glassy carbon (gc) electrodes modified with a thin layer of polymeric cobalt phthalocyanines is described. Cyclic voltammetry (cu) in aqueous media yields a welldefined chemically irreversible anodic wave (E and peak currents for this process vary linearly with the square root o P = -0.3OV vs. see at pH 13), scan rate. Limiting currents measured at a rotating disk electrode are independent of the film thickness at a given substrate concentration; linear Levich plots are obtained under all experimental conditions used. Evaluation of the available data in light of the Savbant model for electrocatalysis at polymer-modified electrodes suggests that the kinetics of the net 4e--process is controlled by the diffusion of substrate from bulk solution to the solution/polymer interface.