Electrochemical oxidation of ascorbic acid using MgB2-MWCNT modified glassy carbon electrode
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...
| Main Authors: | , , , , , |
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| Format: | Article |
| Language: | English English |
| Published: |
Electrochemical Science Group
2013
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| Online Access: | http://psasir.upm.edu.my/id/eprint/30026/1/Electrochemical%20oxidation%20of%20ascorbic%20acid%20using%20MgB2.pdf |
| Summary: | 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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