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Electrochemical redox of Hg2+ mediated by activated carbon modified glassy carbon electrode.

The use of a glassy carbon electrode (GCE) modified by activated carbon (AC) mediates the redox of mercuric chloride (HgCl2) in 0.1 M aqueous solution of potassium chloride (KCl) supporting electrolyte. During cyclic voltammetry, an oxidation and two reduction peaks of Hg2+ were appearing at +200, +...

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Main Authors: Radhi, Muhammed Mizher, Tan, Wee Tee, Ab. Rahman, Mohamad Zaki, Kassim, Anuar
Format: Article
Language:English
English
Published: Electrochemical Science Group 2010
Online Access:http://psasir.upm.edu.my/id/eprint/14465/1/Electrochemical%20redox%20of%20Hg2.pdf
http://psasir.upm.edu.my/id/eprint/14465/
http://www.electrochemsci.org/
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spelling my.upm.eprints.144652015-11-02T02:34:32Z http://psasir.upm.edu.my/id/eprint/14465/ Electrochemical redox of Hg2+ mediated by activated carbon modified glassy carbon electrode. Radhi, Muhammed Mizher Tan, Wee Tee Ab. Rahman, Mohamad Zaki Kassim, Anuar The use of a glassy carbon electrode (GCE) modified by activated carbon (AC) mediates the redox of mercuric chloride (HgCl2) in 0.1 M aqueous solution of potassium chloride (KCl) supporting electrolyte. During cyclic voltammetry, an oxidation and two reduction peaks of Hg2+ were appearing at +200, +680 and +100mV respectively, versus Ag/AgCl. The redox current of Hg2+ was enhanced by two folds at AC modified GCE and about five folds in acidic media. The oxidation peak of Hg2+ was shifted to lower potential by approximately 5mV and for the reduction peak was shifted to 0 mV in acidic solution at AC/GCE. The sensitivity under condition of cyclic voltammetry was significantly dependent on pH, concentration of AA and temperature. interference with Hg2+ was observed in different metal ions, such as Ca2+, Cu2+, Ni2+, Mn2+ and Cd2+. The current enhancement appeared and causes further increase in the reduction peaks of Hg2+, in contrast the oxidation current decrease when increase the concentration of the interference metals. Excellent analytical recovery results were observed with using blood sample and seawater. The surface charge determined by chronocoulometry(CC) of Hg2+ at AC/GCE in acid solution was more conductive than use of GCE. Diffusion coefficient determined by chronoamperometry (CA) for Hg2+ at AC/GCE in presence of AA was promising results. Electrochemical Science Group 2010-05 Article PeerReviewed application/pdf en http://psasir.upm.edu.my/id/eprint/14465/1/Electrochemical%20redox%20of%20Hg2.pdf Radhi, Muhammed Mizher and Tan, Wee Tee and Ab. Rahman, Mohamad Zaki and Kassim, Anuar (2010) Electrochemical redox of Hg2+ mediated by activated carbon modified glassy carbon electrode. International Journal of Electrochemical Science, 5. pp. 615-629. ISSN 1452-3981 http://www.electrochemsci.org/ 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 use of a glassy carbon electrode (GCE) modified by activated carbon (AC) mediates the redox of mercuric chloride (HgCl2) in 0.1 M aqueous solution of potassium chloride (KCl) supporting electrolyte. During cyclic voltammetry, an oxidation and two reduction peaks of Hg2+ were appearing at +200, +680 and +100mV respectively, versus Ag/AgCl. The redox current of Hg2+ was enhanced by two folds at AC modified GCE and about five folds in acidic media. The oxidation peak of Hg2+ was shifted to lower potential by approximately 5mV and for the reduction peak was shifted to 0 mV in acidic solution at AC/GCE. The sensitivity under condition of cyclic voltammetry was significantly dependent on pH, concentration of AA and temperature. interference with Hg2+ was observed in different metal ions, such as Ca2+, Cu2+, Ni2+, Mn2+ and Cd2+. The current enhancement appeared and causes further increase in the reduction peaks of Hg2+, in contrast the oxidation current decrease when increase the concentration of the interference metals. Excellent analytical recovery results were observed with using blood sample and seawater. The surface charge determined by chronocoulometry(CC) of Hg2+ at AC/GCE in acid solution was more conductive than use of GCE. Diffusion coefficient determined by chronoamperometry (CA) for Hg2+ at AC/GCE in presence of AA was promising results.
format Article
author Radhi, Muhammed Mizher
Tan, Wee Tee
Ab. Rahman, Mohamad Zaki
Kassim, Anuar
spellingShingle Radhi, Muhammed Mizher
Tan, Wee Tee
Ab. Rahman, Mohamad Zaki
Kassim, Anuar
Electrochemical redox of Hg2+ mediated by activated carbon modified glassy carbon electrode.
author_facet Radhi, Muhammed Mizher
Tan, Wee Tee
Ab. Rahman, Mohamad Zaki
Kassim, Anuar
author_sort Radhi, Muhammed Mizher
title Electrochemical redox of Hg2+ mediated by activated carbon modified glassy carbon electrode.
title_short Electrochemical redox of Hg2+ mediated by activated carbon modified glassy carbon electrode.
title_full Electrochemical redox of Hg2+ mediated by activated carbon modified glassy carbon electrode.
title_fullStr Electrochemical redox of Hg2+ mediated by activated carbon modified glassy carbon electrode.
title_full_unstemmed Electrochemical redox of Hg2+ mediated by activated carbon modified glassy carbon electrode.
title_sort electrochemical redox of hg2+ mediated by activated carbon modified glassy carbon electrode.
publisher Electrochemical Science Group
publishDate 2010
url http://psasir.upm.edu.my/id/eprint/14465/1/Electrochemical%20redox%20of%20Hg2.pdf
http://psasir.upm.edu.my/id/eprint/14465/
http://www.electrochemsci.org/
_version_ 1643825640867102720
score 13.211869

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