Kumar, A.V.N. and Harish, S. and Joseph, J. and Phani, K.L.N. (2011) Nix–Fe(1-x)Fe(CN)6 hybrid thin films electrodeposited on glassy carbon: Effect of tuning of redox potentials on the electrocatalysis of hydrogen peroxide. Journal of Electroanalytical Chemistry , 659 (002). pp. 128-133. ISSN 1572-6657

PDF - Published Version Restricted to Registered users only Download (470Kb) | Request a copy

Abstract

The electrochemical deposition of mixed Nix–Fe(1-x)Fe(CN)6 thin films on a glassy carbon (GC) electrode surface were carried out by electro-deposition under continuous potential cycling condition for the first time. The redox potential of the low spin iron in the hybrid film was found to depend on the ratio of metal centres. The improvement in the electrocatalytic property of the nickel hexacyanoferrate film with incorporation of iron ions in the film towards the electrocatalysis of hydrogen peroxide was studied in electrolytes like KNO3 and NaNO3. The stability of hybrid film in Na+ containing supporting electrolytes was examined. Detection limit of H2O2 was about 1 lM as determined by amperometry with the sensitivity of 192 nA/lM. The chemically modified glassy carbon electrodes with NixFe(1-x)HCF hybrid films were characterized by cyclic voltammetry, impedance spectroscopy, energy dispersive X-ray analysis etc. These films may find extensive applications as redox mediators in biosensors which employ oxidase enzymes

Item Type:	Article
Uncontrolled Keywords:	Chemically modified electrodes; MHCF hybrids; H2O2 sensor; Electrocatalysis
Subjects:	Electrodics and Electrocatalysis
Divisions:	UNSPECIFIED
Depositing User:	ttbdu cecri
Date Deposited:	19 Nov 2012 10:36
Last Modified:	19 Nov 2012 10:36
URI:	http://cecri.csircentral.net/id/eprint/2902

Actions (login required)

View Item