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Electrochemical reduction of hydrogen peroxide on stainless steel

Patra, S and Munichandraiah, N (2009) Electrochemical reduction of hydrogen peroxide on stainless steel. In: Proceedings of the Indian Academy of Sciences - Chemical Sciences, 121 (5). pp. 675-683.

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Abstract

Electrochemical reduction of hydrogen peroxide is studied on a sand-blasted stainless steel (SSS)electrode in an aqueous solution of NaClO4.The cyclic voltammetric reduction of H2O2 at low concentrations is characterized by a cathodic peak at -0 center dot 40 V versus standard calomel electrode(SCE).Cyclic voltammetry is studied by varying the concentration of H2O2 in the range from 0 center dot 2 mM to 20 mM and the sweep rate in the range from 2 to 100 mV s(-1)Voltammograms at concentrations of H2O2 higher than 2 mM or at high sweep rates consist of an additional current peak, which may be due to the reduction of adsorbed species formed during the reduction of H2O2. Amperometric determination of H2O2 at -0 center dot 50 V vs SCEprovides the detection limit of 5 A mu M H2O2. A plot of current density versus concentration has two segments suggesting a change in the mechanism of H2O2 reduction at concentrations of H2O2 a parts per thousand yen 2 mM. From the rotating disc electrode study, diffusion co-efficient of H2O2 and rate constant for reduction of H2O2 are evaluated.

Item Type: Journal Article
Additional Information: copyright of this article belongs to Indian Academy of Sciences.
Keywords: Electrochemical reduction of H2O2;stainless steel electrode;cyclic voltammetry;amperometry;rotating disc electrode.
Department/Centre: Division of Chemical Sciences > Inorganic & Physical Chemistry
Date Deposited: 13 Jan 2010 08:03
Last Modified: 19 Sep 2010 05:53
URI: http://eprints.iisc.ernet.in/id/eprint/25150

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