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Electrochemical oxidation of ascorbic acid using MgB2-MWCNT modified glassy carbon electrode


Citation

Banan, Darlene and Tan, Wee Tee and Sulaiman, Yusran and M. F., Yusri and Zidan, Mohammed and Ab. Ghani, Sulaiman (2013) Electrochemical oxidation of ascorbic acid using MgB2-MWCNT modified glassy carbon electrode. International Journal of Electrochemical Science, 8 (12). pp. 12519-12530. ISSN 1452-3981

Abstract / Synopsis

The electrochemical properties of ascorbic acid (AA) have been studied using cyclic voltammetry technique at the surface of MgB2-MWCNT mixture modified glassy carbon electrode (MgB2-MWCNT/GCE) via mechanical attachment method. An enhancement factor of the ascorbic acid oxidation current by about 2 fold compared to the bare electrode was observed. The current was due to diffusion-adsorption process with diffusion activation energy of 2.7kJmol-1. The MgB2-MWCNT/GCE has a limit of detection of 1.3µM AA with a sensitivity of 76.6 mA M-1AA. Good reproducibility and recovery rate was obtained when determining the presence of AA in real life samples.


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Additional Metadata

Item Type: Article
Divisions: Faculty of Science
Publisher: Electrochemical Science Group
Keywords: Ascorbic Acid; Cyclic Voltammetry; Glassy carbon electrode; Magnesium boride; Multiwalled carbon nanotube.
Depositing User: Umikalthom Abdullah
Date Deposited: 18 Jun 2014 09:55
Last Modified: 24 Aug 2015 15:24
URI: http://psasir.upm.edu.my/id/eprint/30026
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