Electrochemical oxidation of ascorbic acid mediated by Bi2O3 microparticles modified glassy carbon electrode.
Bismuth oxide (Bi2O3) modified glassy carbon electrode (GCE) was fabricated by mechanical attachment. Electrochemical performance of microparticles of Bi2O3/GCE shows excellent electrooxidation of ascorbic acid (AA) in 0.1M KH2PO4 using cyclic voltammetry. The effect of Bi2O3/GCE is evident by the o...
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| Format: | Article |
| Language: | English English |
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Electrochemical Science Group
2011
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| Online Access: | http://psasir.upm.edu.my/id/eprint/24775/ http://psasir.upm.edu.my/id/eprint/24775/1/Electrochemical%20oxidation%20of%20ascorbic%20acid%20mediated%20by%20Bi2O3%20microparticles%20modified%20glassy%20carbon%20electrode.pdf |
| _version_ | 1848845128378089472 |
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| author | Mohammed Zidan, Tan, Wee Tee Abdullah, Abdul Halim Zainal, Zulkarnain Goh, Joo Kheng |
| author_facet | Mohammed Zidan, Tan, Wee Tee Abdullah, Abdul Halim Zainal, Zulkarnain Goh, Joo Kheng |
| author_sort | Mohammed Zidan, |
| building | UPM Institutional Repository |
| collection | Online Access |
| description | Bismuth oxide (Bi2O3) modified glassy carbon electrode (GCE) was fabricated by mechanical attachment. Electrochemical performance of microparticles of Bi2O3/GCE shows excellent electrooxidation of ascorbic acid (AA) in 0.1M KH2PO4 using cyclic voltammetry. The effect of Bi2O3/GCE is evident by the observation of high peak oxidation current of AA, showing an increase of 2 folds as compared to bare GCE. The detection limit of this modified electrode was found to be 8.1 × 10-6M. Hydrodynamic method (RDE) was used to determine the diffusion coefficient and rate constant of AA with values of 5.4 × 10-6 cm2s-1 and 2.7x10-3 cms-1 for unmodified electrode, while the values of 6.2x10-6 cm2s-1 and 2.3x10-3 cms-1 for GCE modified with Bi2O3, respectively. |
| first_indexed | 2025-11-15T08:41:53Z |
| format | Article |
| id | upm-24775 |
| institution | Universiti Putra Malaysia |
| institution_category | Local University |
| language | English English |
| last_indexed | 2025-11-15T08:41:53Z |
| publishDate | 2011 |
| publisher | Electrochemical Science Group |
| recordtype | eprints |
| repository_type | Digital Repository |
| spelling | upm-247752015-10-19T23:37:55Z http://psasir.upm.edu.my/id/eprint/24775/ Electrochemical oxidation of ascorbic acid mediated by Bi2O3 microparticles modified glassy carbon electrode. Mohammed Zidan, Tan, Wee Tee Abdullah, Abdul Halim Zainal, Zulkarnain Goh, Joo Kheng Bismuth oxide (Bi2O3) modified glassy carbon electrode (GCE) was fabricated by mechanical attachment. Electrochemical performance of microparticles of Bi2O3/GCE shows excellent electrooxidation of ascorbic acid (AA) in 0.1M KH2PO4 using cyclic voltammetry. The effect of Bi2O3/GCE is evident by the observation of high peak oxidation current of AA, showing an increase of 2 folds as compared to bare GCE. The detection limit of this modified electrode was found to be 8.1 × 10-6M. Hydrodynamic method (RDE) was used to determine the diffusion coefficient and rate constant of AA with values of 5.4 × 10-6 cm2s-1 and 2.7x10-3 cms-1 for unmodified electrode, while the values of 6.2x10-6 cm2s-1 and 2.3x10-3 cms-1 for GCE modified with Bi2O3, respectively. Electrochemical Science Group 2011 Article PeerReviewed application/pdf en http://psasir.upm.edu.my/id/eprint/24775/1/Electrochemical%20oxidation%20of%20ascorbic%20acid%20mediated%20by%20Bi2O3%20microparticles%20modified%20glassy%20carbon%20electrode.pdf Mohammed Zidan, and Tan, Wee Tee and Abdullah, Abdul Halim and Zainal, Zulkarnain and Goh, Joo Kheng (2011) Electrochemical oxidation of ascorbic acid mediated by Bi2O3 microparticles modified glassy carbon electrode. International Journal of Electrochemical Science, 6 (2). pp. 289-300. ISSN 1452-3981 http://www.electrochemsci.org/ English |
| spellingShingle | Mohammed Zidan, Tan, Wee Tee Abdullah, Abdul Halim Zainal, Zulkarnain Goh, Joo Kheng Electrochemical oxidation of ascorbic acid mediated by Bi2O3 microparticles modified glassy carbon electrode. |
| title | Electrochemical oxidation of ascorbic acid mediated by Bi2O3 microparticles modified glassy carbon electrode. |
| title_full | Electrochemical oxidation of ascorbic acid mediated by Bi2O3 microparticles modified glassy carbon electrode. |
| title_fullStr | Electrochemical oxidation of ascorbic acid mediated by Bi2O3 microparticles modified glassy carbon electrode. |
| title_full_unstemmed | Electrochemical oxidation of ascorbic acid mediated by Bi2O3 microparticles modified glassy carbon electrode. |
| title_short | Electrochemical oxidation of ascorbic acid mediated by Bi2O3 microparticles modified glassy carbon electrode. |
| title_sort | electrochemical oxidation of ascorbic acid mediated by bi2o3 microparticles modified glassy carbon electrode. |
| url | http://psasir.upm.edu.my/id/eprint/24775/ http://psasir.upm.edu.my/id/eprint/24775/ http://psasir.upm.edu.my/id/eprint/24775/1/Electrochemical%20oxidation%20of%20ascorbic%20acid%20mediated%20by%20Bi2O3%20microparticles%20modified%20glassy%20carbon%20electrode.pdf |