Design of Amperometric Sensors for H2O2 based on K0.27MnO2·xH2O Thin Films

Stojkovikj, Sasho and Mirceski, Valentin and Sefer, Birhan and Najdoski, Metodija (2016) Design of Amperometric Sensors for H2O2 based on K0.27MnO2·xH2O Thin Films. In: MatCatNet Workshop - From Molecules to Functionalized Materials, 1-5 Sept 2016, Ohrid, Macedonia.

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Abstract

The scientific interest in the development of electrochemical sensors for hydrogen peroxide based on transition element substances, especially manganese compounds modified electrodes is very attractive nowadays. We have designed a new kind of simple and cheap nonenzymatic amperometric sensor based on K0.27MnO2·xH2O modified FTO electrode for detection and quantification of hydrogen peroxide. A thin film of K0.27MnO2·xH2O is deposited on the FTO surface using simple chemical deposition method. The chemical composition and structure of the deposited material are studied using XRD and FTIR spectroscopy. The electrochemical and sensing properties are studied using cyclic voltammetry and chronoamperometry. All electrochemical measurements are carried out in three electrode system using phosphate buffer solution (HPO42-/H2PO4-) with pH = 7.5 as electrolyte in the presence of atmospheric oxygen. The best results are obtained at potential of +0.30 V in concentration range of H2O2 from 1 up to 20 µM. The calibration plot is associated with a linear amperometric response and coefficient of R2 = 0.99.

Item Type:	Conference or Workshop Item (Speech)
Subjects:	Natural sciences > Chemical sciences Engineering and Technology > Materials engineering
Divisions:	Faculty of Technology
Depositing User:	Saso Stojkovik
Date Deposited:	04 Mar 2024 13:22
Last Modified:	05 Mar 2024 11:31
URI:	https://eprints.ugd.edu.mk/id/eprint/33810

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