Application of Potassium Birnessite Thin Film/FTO Modified Electrodes as Nonenzymatic Sensors for Hydrogen Peroxide

Stojkovikj, Sasho and Mirceski, Valentin and Najdoski, Metodija and Sefer, Birhan (2016) Application of Potassium Birnessite Thin Film/FTO Modified Electrodes as Nonenzymatic Sensors for Hydrogen Peroxide. In: 2nd International Congress of Chemists and Chemical Engineers of Bosnia and Herzegovina, 21-23 Aug 2016, Sarajevo, Bosnia and Herzegovina.

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Abstract

We have developed a new kind of simple and cost effective nonenzymatic amperometric sensor based on potassium birnessite thin film modified FTO electrode for detection and quantification of hydrogen peroxide. The film is deposited on the FTO surface using dip coating method from two aqueous solutions containing manganese(II) chloride and potassium permanganate, respectively. The material used for working electrode modification is examined with XRPD and FTIR in order to estimate the chemical composition and structure. AFM is used to characterize the surface morphology of the thin film. The electrochemical and sensing properties are investigated using cyclic voltammetry and chronoamperometry. All electrochemical measurements are carried out in three electrode system using phosphate buffer solution (HPO4 2-/H2PO4 -) with pH = 7.5 as electrolyte in the presence of atmospheric oxygen. The best results are obtained under oxidation potential in concentration range of H2O2 from 10 up to 1500 μM. The lowest detection limit was 10 μM and the sensitivity of the sensor was 353 μA·cm-2·mM-1 (in concentration range 10-50 μM). The calibration plot is associated with a linear regression line and coefficient of R2 = 0.99.

Item Type:	Conference or Workshop Item (Poster)
Additional Information:	The abstract is published in the Bulletin of the Chemists & Technologists of Bosnia & Herzegovina / Glasnik Hemičara i Tehnologa Bosne i Hercegovine, 2016, p76
Subjects:	Natural sciences > Chemical sciences Engineering and Technology > Materials engineering
Divisions:	Faculty of Technology
Depositing User:	Saso Stojkovik
Date Deposited:	04 Mar 2024 13:15
Last Modified:	04 Mar 2024 13:15
URI:	https://eprints.ugd.edu.mk/id/eprint/33802

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