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Electrocatalytic oxidation of ascorbic acid mediated by lithium doped microparticles Bi2O3/MWCNT modified glassy carbon electrode

Use of a lithium doped Bismuth oxide and MWCNT modified glassy carbon electrode (Bi2O3/Li+/CNT/GC) enhance the oxidation current of ascorbic acid during cyclic voltammetry compared to bare GC and (Bi2O3 /Li+/ CNT) modified electrode. Peak potential was observed to shift slightly to less positive val...

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Main Authors: Zidan, Mohammed, Tan, Wee Tee, Zainal, Zulkarnain, Abdullah, Abdul Halim, Goh, Joo Kheng
Format: Article
Language:English
Published: Electrochemical Science Group 2010
Online Access:http://psasir.upm.edu.my/id/eprint/14458/1/Electrocatalytic%20oxidation%20of%20ascorbic%20acid%20mediated%20by%20lithium%20doped%20microparticles%20Bi2O3MWCNT%20modified%20glassy%20carbon%20electrode.pdf
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spelling oai:psasir.upm.edu.my:14458 http://psasir.upm.edu.my/id/eprint/14458/ Electrocatalytic oxidation of ascorbic acid mediated by lithium doped microparticles Bi2O3/MWCNT modified glassy carbon electrode Zidan, Mohammed Tan, Wee Tee Zainal, Zulkarnain Abdullah, Abdul Halim Goh, Joo Kheng Use of a lithium doped Bismuth oxide and MWCNT modified glassy carbon electrode (Bi2O3/Li+/CNT/GC) enhance the oxidation current of ascorbic acid during cyclic voltammetry compared to bare GC and (Bi2O3 /Li+/ CNT) modified electrode. Peak potential was observed to shift slightly to less positive value by about 220 mV and current was significantly enhanced by about two folds. The sensitivity under conditions of cyclic voltammetry is significantly dependent on pH, temperature, electrolyte and scan rate. The result of scanning electron micrograph shows that the size increased slightly by < 1 μm after electrolysis using Bi2O3 /Li+/ CNT modified electrode. The detection limit of this modified electrode was found to be 50μM. The oxidation current of ascorbic acid decreased slightly after the first cycle and became stable with minor decreases after second cycle. It is therefore evident that the Bi2O3/CNT modified GC electrode possesses some degree of stability. Potential use of Bi2O3/CNT as a useful electrode material is therefore clearly evident. Electrochemical Science Group 2010 Article PeerReviewed text en http://psasir.upm.edu.my/id/eprint/14458/1/Electrocatalytic%20oxidation%20of%20ascorbic%20acid%20mediated%20by%20lithium%20doped%20microparticles%20Bi2O3MWCNT%20modified%20glassy%20carbon%20electrode.pdf Zidan, Mohammed and Tan, Wee Tee and Zainal, Zulkarnain and Abdullah, Abdul Halim and Goh, Joo Kheng (2010) Electrocatalytic oxidation of ascorbic acid mediated by lithium doped microparticles Bi2O3/MWCNT modified glassy carbon electrode. International Journal of Electrochemical Science, 5 (4). pp. 501-508. ISSN 1452-3981 http://www.electrochemsci.org/list10.htm#issue3
institution UPM IR
collection UPM IR
language English
description Use of a lithium doped Bismuth oxide and MWCNT modified glassy carbon electrode (Bi2O3/Li+/CNT/GC) enhance the oxidation current of ascorbic acid during cyclic voltammetry compared to bare GC and (Bi2O3 /Li+/ CNT) modified electrode. Peak potential was observed to shift slightly to less positive value by about 220 mV and current was significantly enhanced by about two folds. The sensitivity under conditions of cyclic voltammetry is significantly dependent on pH, temperature, electrolyte and scan rate. The result of scanning electron micrograph shows that the size increased slightly by < 1 μm after electrolysis using Bi2O3 /Li+/ CNT modified electrode. The detection limit of this modified electrode was found to be 50μM. The oxidation current of ascorbic acid decreased slightly after the first cycle and became stable with minor decreases after second cycle. It is therefore evident that the Bi2O3/CNT modified GC electrode possesses some degree of stability. Potential use of Bi2O3/CNT as a useful electrode material is therefore clearly evident.
format Article
author Zidan, Mohammed
Tan, Wee Tee
Zainal, Zulkarnain
Abdullah, Abdul Halim
Goh, Joo Kheng
spellingShingle Zidan, Mohammed
Tan, Wee Tee
Zainal, Zulkarnain
Abdullah, Abdul Halim
Goh, Joo Kheng
Electrocatalytic oxidation of ascorbic acid mediated by lithium doped microparticles Bi2O3/MWCNT modified glassy carbon electrode
author_facet Zidan, Mohammed
Tan, Wee Tee
Zainal, Zulkarnain
Abdullah, Abdul Halim
Goh, Joo Kheng
author_sort Zidan, Mohammed
title Electrocatalytic oxidation of ascorbic acid mediated by lithium doped microparticles Bi2O3/MWCNT modified glassy carbon electrode
title_short Electrocatalytic oxidation of ascorbic acid mediated by lithium doped microparticles Bi2O3/MWCNT modified glassy carbon electrode
title_full Electrocatalytic oxidation of ascorbic acid mediated by lithium doped microparticles Bi2O3/MWCNT modified glassy carbon electrode
title_fullStr Electrocatalytic oxidation of ascorbic acid mediated by lithium doped microparticles Bi2O3/MWCNT modified glassy carbon electrode
title_full_unstemmed Electrocatalytic oxidation of ascorbic acid mediated by lithium doped microparticles Bi2O3/MWCNT modified glassy carbon electrode
title_sort electrocatalytic oxidation of ascorbic acid mediated by lithium doped microparticles bi2o3/mwcnt modified glassy carbon electrode
publisher Electrochemical Science Group
publishDate 2010
url http://psasir.upm.edu.my/id/eprint/14458/1/Electrocatalytic%20oxidation%20of%20ascorbic%20acid%20mediated%20by%20lithium%20doped%20microparticles%20Bi2O3MWCNT%20modified%20glassy%20carbon%20electrode.pdf
_version_ 1819293816987844608
score 13.4562235

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