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International Journal of Electrochemistry
Volume 2014, Article ID 316254, 6 pages
http://dx.doi.org/10.1155/2014/316254
Research Article

Electrocatalytic Oxidation and Determination of Cysteine at Oxovanadium(IV) Salen Coated Electrodes

Department of Chemistry, Faculty of Science, Banaras Hindu University, Varanasi, Uttar Pradesh 221 005, India

Received 11 June 2014; Accepted 16 December 2014; Published 28 December 2014

Academic Editor: Hamilton Varela

Copyright © 2014 Piyush Kumar Sonkar et al. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

Abstract

A transition metal complex, oxovanadium(IV) salen (where salen represents N,N′-bis(salicylidene)ethylenediamine) is immobilized on glassy carbon (GC) electrodes and utilized for electrocatalytic oxidation of cysteine. In presence of oxovanadium(IV) salen, increased oxidation current is observed due to the effective oxidation of cysteine by the electrogenerated oxovanadium(V) salen species. The oxidation current linearly varies with the concentration of cysteine from 0.1 to 1.0 mM. The modified electrode has good sensitivity and low limit of detection. These properties make the oxovanadium(IV) salen as an effective electrocatalyst for the determination of cysteine.