Cover Image

Electrochemical Oxidation of Methionine Mediated by a Fullerene-C60 Modified Gold Electrode

The usefulness of a C60-fullerene modified gold (Au) electrode in mediating the oxidation of methionine in the presence of potassium ions electrolyte has been demonstrated. During cyclic voltammetry, an oxidation peak of methionine appearing at þ1.0 V vs. Ag/AgCl was observed. The oxidation current...

Full description

Saved in:
Bibliographic Details
Main Authors: Tan, Wee Tee, Goh, Joo Kheng
Format: Article
Language:English
English
Published: Wiley Blackwell 2008
Online Access:http://psasir.upm.edu.my/id/eprint/6146/1/Electrochemical%20Oxidation%20of%20Methionine%20Mediated%20by%20a%20Fullerene.pdf
http://psasir.upm.edu.my/id/eprint/6146/
http://dx.doi.org/10.1002/elan.200704335
Tags: Add Tag
No Tags, Be the first to tag this record!
id my.upm.eprints.6146
record_format eprints
spelling my.upm.eprints.61462016-01-20T06:51:29Z http://psasir.upm.edu.my/id/eprint/6146/ Electrochemical Oxidation of Methionine Mediated by a Fullerene-C60 Modified Gold Electrode Tan, Wee Tee Goh, Joo Kheng The usefulness of a C60-fullerene modified gold (Au) electrode in mediating the oxidation of methionine in the presence of potassium ions electrolyte has been demonstrated. During cyclic voltammetry, an oxidation peak of methionine appearing at þ1.0 V vs. Ag/AgCl was observed. The oxidation current of methionine is enhanced by about 2 times using a C60 modified gold electrode. The current enhancement is significantly dependent on pH, temperature and C60 dosage. Calibration plot reveals linearity of up to 0.1 mM with a current sensitivity of close to 50 mA L mol1 and detection limit of 8.2106 M. The variation of scan rate study shows that the system undergoes diffusion-controlled process. Diffusion coefficient and rate constant of methionine were determined using hydrodynamicmethod(rotating disk electrode) with values of 1.11105 cm2 s1 and 0.0026 cm s1 respectively for unmodified electrode while the values of diffusion coefficient and rate constant of methionine using C60 modified Au electrode are 5.7106 cm2 s1 and 0.0021 cm s1 respectively Wiley Blackwell 2008 Article PeerReviewed application/pdf en http://psasir.upm.edu.my/id/eprint/6146/1/Electrochemical%20Oxidation%20of%20Methionine%20Mediated%20by%20a%20Fullerene.pdf Tan, Wee Tee and Goh, Joo Kheng (2008) Electrochemical Oxidation of Methionine Mediated by a Fullerene-C60 Modified Gold Electrode. Electroanalysis, 20 (22). pp. 2447-2453. ISSN 1040-0397 http://dx.doi.org/10.1002/elan.200704335 10.1002/elan.200704335 English
institution Universiti Putra Malaysia
building UPM Library
collection Institutional Repository
continent Asia
country Malaysia
content_provider Universiti Putra Malaysia
content_source UPM Institutional Repository
url_provider http://psasir.upm.edu.my/
language English
English
description The usefulness of a C60-fullerene modified gold (Au) electrode in mediating the oxidation of methionine in the presence of potassium ions electrolyte has been demonstrated. During cyclic voltammetry, an oxidation peak of methionine appearing at þ1.0 V vs. Ag/AgCl was observed. The oxidation current of methionine is enhanced by about 2 times using a C60 modified gold electrode. The current enhancement is significantly dependent on pH, temperature and C60 dosage. Calibration plot reveals linearity of up to 0.1 mM with a current sensitivity of close to 50 mA L mol1 and detection limit of 8.2106 M. The variation of scan rate study shows that the system undergoes diffusion-controlled process. Diffusion coefficient and rate constant of methionine were determined using hydrodynamicmethod(rotating disk electrode) with values of 1.11105 cm2 s1 and 0.0026 cm s1 respectively for unmodified electrode while the values of diffusion coefficient and rate constant of methionine using C60 modified Au electrode are 5.7106 cm2 s1 and 0.0021 cm s1 respectively
format Article
author Tan, Wee Tee
Goh, Joo Kheng
spellingShingle Tan, Wee Tee
Goh, Joo Kheng
Electrochemical Oxidation of Methionine Mediated by a Fullerene-C60 Modified Gold Electrode
author_facet Tan, Wee Tee
Goh, Joo Kheng
author_sort Tan, Wee Tee
title Electrochemical Oxidation of Methionine Mediated by a Fullerene-C60 Modified Gold Electrode
title_short Electrochemical Oxidation of Methionine Mediated by a Fullerene-C60 Modified Gold Electrode
title_full Electrochemical Oxidation of Methionine Mediated by a Fullerene-C60 Modified Gold Electrode
title_fullStr Electrochemical Oxidation of Methionine Mediated by a Fullerene-C60 Modified Gold Electrode
title_full_unstemmed Electrochemical Oxidation of Methionine Mediated by a Fullerene-C60 Modified Gold Electrode
title_sort electrochemical oxidation of methionine mediated by a fullerene-c60 modified gold electrode
publisher Wiley Blackwell
publishDate 2008
url http://psasir.upm.edu.my/id/eprint/6146/1/Electrochemical%20Oxidation%20of%20Methionine%20Mediated%20by%20a%20Fullerene.pdf
http://psasir.upm.edu.my/id/eprint/6146/
http://dx.doi.org/10.1002/elan.200704335
_version_ 1643823401302753280
score 13.211869

Similar Items