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Bulletin of the Korean Chemical Society (BKCS)

ISSN 0253-2964(Print)
ISSN 1229-5949(Online)
Volume 19, Number 4
BKCSDE 19(4)
April 20, 1998 

The Electrocatalytic Reduction of Molecular Oxygen with a Co(II)-Glyoxal Bis(2-hydroxyanil) Complex Coated Electrode
Euh Duck Jeong, Mi Sook Won, Yoon Bo Shim*
The electrocatalytic reduction of molecular oxygen was investigated with a Co(II)-glyoxal bis(2-hydroxyanil) complex coated-glassy carbon (GC) electrode in aqueous media. The reduction of O2 at the modified electrode was an irreversible and diffusion-controlled reaction. The complex coated-GC electrode demonstrated an excellent electrocatalytic effect for O2 reduction in an acetate buffer solution of pH 3.2. The coated electrode made the O2 reduction potential shift of 60-510 mV in a positive direction compared to the bare GC electrode depending on pH. The Co(II)-glyoxal bis(2-hydroxyanil) coated electrode converted about 51 % of the O2 to H2O2 via a two-electron reduction pathway, with the balance converted to H2O.
417 - 422
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