Electrocatalytic Oxidation of Nitric Oxide at Carbon Paste Electrode Modified with Chromium (III) Oxide

Authors

  • Liridon S. Berisha Department of Chemistry, Faculty of Mathematical & Natural Sciences, Prishtine-Kosovo
  • Kurt Kalcher Institute of Chemistry, Analytical Chemistry, Karl-Franzens University Graz
  • Arsim Maloku Department of Chemistry, Faculty of Mathematical & Natural Sciences, Prishtine-Kosovo
  • Eduard Andoni Departament of Chemistry, Faculty of Natural Sciences, University of Tirana,
  • Tahir Arbneshi Faculty of Mathematical & Natural Sciences,Prishtine-Kosovo

DOI:

https://doi.org/10.24297/jac.v5i3.2676

Keywords:

Sensor, Nitric Oxide, Chromium (III) oxide, Electrocatalytic, Carbon Paste electrode

Abstract

Chromium (III) oxide was used as a bulk mediator in carbon paste electrodes to improve the better performance of the carbon electrodes for the detection of nitric oxide in comparison with unmodified electrodes. The reaction mechanism of the electrocatalytic oxidation of NO at the modified electrode was studied using cyclic voltammetry and differential pulse voltammetry. The chemical sensor could be operated under physiological conditions (pH 7.5, 0.1 M phosphate buffer), with an operating potential of 750 mV (vs. Ag/AgCl), in hydrodynamic amperometry. The amperometric response of the sensor showed good linearity up to 200 mmol/L with a detection limit (3σ) of 0.69 mmol/L. The effect of the interferent nitrite was not fatal and could be eliminated by the use of the standard addition method. The new chemical sensor seems also promising to detect NO in car exhaust fumes.

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Author Biographies

Liridon S. Berisha, Department of Chemistry, Faculty of Mathematical & Natural Sciences, Prishtine-Kosovo

Analitical Chemistry, Dapartment of Chemistry

Kurt Kalcher, Institute of Chemistry, Analytical Chemistry, Karl-Franzens University Graz

Analytical Chemistry

Arsim Maloku, Department of Chemistry, Faculty of Mathematical & Natural Sciences, Prishtine-Kosovo

CHEMISTRY, Analytical Chemistry

Eduard Andoni, Departament of Chemistry, Faculty of Natural Sciences, University of Tirana,

Chemistry, Inorganic chemistry

Tahir Arbneshi, Faculty of Mathematical & Natural Sciences,Prishtine-Kosovo

Analitical Chemistry, Dapartment of Chemistry

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Published

2009-12-02

How to Cite

Berisha, L. S., Kalcher, K., Maloku, A., Andoni, E., & Arbneshi, T. (2009). Electrocatalytic Oxidation of Nitric Oxide at Carbon Paste Electrode Modified with Chromium (III) Oxide. JOURNAL OF ADVANCES IN CHEMISTRY, 5(3), 792–799. https://doi.org/10.24297/jac.v5i3.2676

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