Electrocatalytic activity and simultaneous determination of catechol and hydroquinone at mesoporous platinum electrode
Electrocatalytic activity and simultaneous determination of catechol and hydroquinone at mesoporous platinum electrode
The electrochemical oxidation of catechol and hydroquinone was investigated using cyclic and differential pulse voltammetries at nanostructured mesoporous platinum film electrochemically deposited from the hexagonal liquid crystalline template of C16EO8 surfactant. The mesoporous platinum electrode has shown an excellent electrocatalytic activity and reversibility towards the oxidation of catechol and hydroquinone redox isomers in 1.0 M HClO4. The oxidation and reduction peak separation (?E) has been decreased from 485 to 55 mV for hydroquinone and from 430 to 75 mV vs. SCE for catechol at polished polycrystalline and mesoporous platinum electrodes, respectively. The differential pulse voltammograms in a mixture solution of catechol and hydroquinone have shown that the oxidation peaks became well resolved and are separated by about 100 mV, although the bare electrode gave a single broad oxidation peak. Moreover, the oxidation current of hydroquinone and catechol has been enhanced by a factor of two and four times, respectively, at mesoporous platinum electrode. Using differential pulse voltammetry, a highly selective and simultaneous determination of hydroquinone and catechol has been explored at mesoporous platinum electrode.
voltammetry, differential pulse, carbon, cyclic voltammetry, electrodes, catechol, nanostructured mesoporous, simultaneous determination, microelectrodes, hydroquinone, nanotubes, platinum, kinetics, oxygen, liquid-crystalline phases, electrochemical deposition, electrooxidation, films
2501-2506
Ghanem, Mohamed A.
cef6c814-2709-4a2f-a052-06d28d0ba04c
October 2007
Ghanem, Mohamed A.
cef6c814-2709-4a2f-a052-06d28d0ba04c
Ghanem, Mohamed A.
(2007)
Electrocatalytic activity and simultaneous determination of catechol and hydroquinone at mesoporous platinum electrode.
Electrochemistry Communications, 9 (10), .
(doi:10.1016/j.elecom.2007.07.023).
Abstract
The electrochemical oxidation of catechol and hydroquinone was investigated using cyclic and differential pulse voltammetries at nanostructured mesoporous platinum film electrochemically deposited from the hexagonal liquid crystalline template of C16EO8 surfactant. The mesoporous platinum electrode has shown an excellent electrocatalytic activity and reversibility towards the oxidation of catechol and hydroquinone redox isomers in 1.0 M HClO4. The oxidation and reduction peak separation (?E) has been decreased from 485 to 55 mV for hydroquinone and from 430 to 75 mV vs. SCE for catechol at polished polycrystalline and mesoporous platinum electrodes, respectively. The differential pulse voltammograms in a mixture solution of catechol and hydroquinone have shown that the oxidation peaks became well resolved and are separated by about 100 mV, although the bare electrode gave a single broad oxidation peak. Moreover, the oxidation current of hydroquinone and catechol has been enhanced by a factor of two and four times, respectively, at mesoporous platinum electrode. Using differential pulse voltammetry, a highly selective and simultaneous determination of hydroquinone and catechol has been explored at mesoporous platinum electrode.
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Published date: October 2007
Keywords:
voltammetry, differential pulse, carbon, cyclic voltammetry, electrodes, catechol, nanostructured mesoporous, simultaneous determination, microelectrodes, hydroquinone, nanotubes, platinum, kinetics, oxygen, liquid-crystalline phases, electrochemical deposition, electrooxidation, films
Identifiers
Local EPrints ID: 54303
URI: http://eprints.soton.ac.uk/id/eprint/54303
ISSN: 1388-2481
PURE UUID: 5e4dcec1-e606-4f01-bd04-bb7f335e0026
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Date deposited: 31 Jul 2008
Last modified: 15 Mar 2024 10:46
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Author:
Mohamed A. Ghanem
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