Thangavelu, S. and Udupa, H.V.K.
(1985)
Voltammetric studies of the reduction of diacetyl on glassy carbon electrode in aqueous solution.
Bulletin of Electrochemistry , 01 (04).
pp. 387-390.
ISSN 0256-1654
Abstract
Voltammetric studies on the reduction of diacetyl have been carried out in the pH range 0-10 in buffered aqueous solutions. The effect of pH, concentration of diacetyl and sweep rate on the peak current and peak potentia1 is studied using cyclic voltammetry. Only one wave is
observed except in the narrow range of pH 7-8 where two waves are observed. In the case of the first wave, under strongly acidic and slightly alkaline conditions the process occuring at potentials corresponding to the limiting current region 1s controlled by dffusion while it is mixed controlled both by the rate Of dehydration reaction and diffusion at intermediate pH conditions. The second wave which appeared in the pH range 7-8, is found to be diffusion controlled at the limiting current region.
From the steady state voltammetric measurements, the Tafel slopes obtained potentials corresponding to the foot of the first wave are found to be dependent on pH and diacetyl
concentration
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