Journal
MATERIALS SCIENCE & ENGINEERING C-BIOMIMETIC AND SUPRAMOLECULAR SYSTEMS
Volume 28, Issue 5-6, Pages 606-612Publisher
ELSEVIER SCIENCE BV
DOI: 10.1016/j.msec.2007.10.054
Keywords
screen printed carbon electrodes; cobalt phthalocyanine; reduced glutathione; 2-mercaptoethanol
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Electro-catalytic behavior of screen printed graphite electrodes modified with cobalt phthalocyanine (CoPc) towards the oxidation of reduced glutathione (GSH) and 2-mercaptoethanol (2-ME) is reported. We find, by using cyclic voltammetry, that the oxidation of 2-ME occurs at 0.2 V vs Ag/AgCl and -0.3 vs Ag/AgCl Vat pH=7 and pH= 13, respectively and that of GSH occurs at 0.4 V vs Ag/AgCl and 0.0 V vs Ag/AgCl at pH=7 and 13, respectively. The electro-catalytic activity depends on the method of electrode modification and the amount of catalyst incorporated in the ink used to fabricate the SPCEs. The highest activity was obtained with electrodes prepared with 2.5% (w:w) of CoPc. (c) 2007 Elsevier B.V. All fights reserved.
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