Non–enzymatic Amperometric Sensor for H2O2 Based on MnCO3 Thin Film Electrodes

Stojkovikj, Sasho and Najdoski, Metodija and Sefer, Birhan and Mirceski, Valentin (2019) Non–enzymatic Amperometric Sensor for H2O2 Based on MnCO3 Thin Film Electrodes. Croatica Chemica Acta, 91 (4). pp. 567-575. ISSN 1334-417X

Text cca3424.pdf Download (556kB)

Abstract

The present study describes development of a non–enzymatic amperometric sensor for detection of H2O2 based on MnCO3 thin film
electrodes. The film was deposited on electroconductive FTO coated glass substrates using simple chemical bath deposition method. The phase
composition of the thin film was confirmed by X-ray diffraction analysis. The electrochemical properties and the sensor sensitivity towards H2O2
were examined using cyclic voltammetry and chronoamperometry in 0.1 M phosphate buffer solution with pH = 7.5. It was revealed that the
sensing mechanism is based on electrocatalytic oxidation of H2O2, involving Mn species as redox mediators. According to the results, the best
sensor response towards H2O2 was found at E = +0.25 V, with detection limit and sensor sensitivity of 10.0 µM and 2.64 µA cm–2 mM–1 (for the
range of 0.09–1.8 mM), respectively, associated with R2 = 0.999.

Keywords: amperometric sensors, hydrogen peroxide, manganese(II) carbonate thin films, electrocatalysis.

Item Type:	Article
Impact Factor Value:	0.3
Subjects:	Natural sciences > Chemical sciences Engineering and Technology > Materials engineering
Divisions:	Faculty of Technology
Depositing User:	Saso Stojkovik
Date Deposited:	29 Feb 2024 09:09
Last Modified:	29 Feb 2024 09:09
URI:	https://eprints.ugd.edu.mk/id/eprint/33790

Actions (login required)

View Item