Electrochemical activity of glutathione at a graphite electrode modified with gold nanoparticles

Abstract

The electrochemical activity of the glutathione (GSH) at the graphite electrodes modified with gold nanoparticles (AuNP-GCE) is formed under the ratio of reactants and in solutions of supporting electrolytes of 0, 1 M NaOH, 0,1 "phosphate buffer (pH 6.86), 0,1 M HCl, 0,1 M NaClO₄ is studied by the method of cyclic voltammetry. The dependence of the electrochemical activity of GSH on ratio of reagents HAuCl₄:Na₃C₆H₅O₇:NaBH₄, used to the preparation of sols, and the modification time of the GE surface with gold nanoparticles have been studied. The "inverse" cathodic peak of GSH at AuNPGCE formed in the reaction mixture HAuCl₄:Na₃C₆H₅O₇:NaBH₄= 1:1:4 is observed on the cathodic branch of cyclic voltammogram at E_c = 0.05 V in 0.1 M NaOH. The mechanism of electrochemical oxidation of the GSH on the surface of AuNP-GCE in 0.1 M NaOH is proposed.

Original language	English
Pages (from-to)	834-844
Number of pages	11
Journal	Oriental Journal of Chemistry
Volume	31
Issue number	2
DOIs	https://doi.org/10.13005/ojc/310226
Publication status	Published - 2015

Keywords

Cyclic voltammetry
Glutathione
Gold nanoparticles
Graphite electrode

ASJC Scopus subject areas

Chemistry(all)
Biochemistry
Environmental Chemistry
Drug Discovery

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10.13005/ojc/310226

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title = "Electrochemical activity of glutathione at a graphite electrode modified with gold nanoparticles",

abstract = "The electrochemical activity of the glutathione (GSH) at the graphite electrodes modified with gold nanoparticles (AuNP-GCE) is formed under the ratio of reactants and in solutions of supporting electrolytes of 0, 1 M NaOH, 0,1 {"}phosphate buffer (pH 6.86), 0,1 M HCl, 0,1 M NaClO4 is studied by the method of cyclic voltammetry. The dependence of the electrochemical activity of GSH on ratio of reagents HAuCl4:Na3C6H5O7:NaBH4, used to the preparation of sols, and the modification time of the GE surface with gold nanoparticles have been studied. The {"}inverse{"} cathodic peak of GSH at AuNPGCE formed in the reaction mixture HAuCl4:Na3C6H5O7:NaBH4= 1:1:4 is observed on the cathodic branch of cyclic voltammogram at Ec = 0.05 V in 0.1 M NaOH. The mechanism of electrochemical oxidation of the GSH on the surface of AuNP-GCE in 0.1 M NaOH is proposed.",

keywords = "Cyclic voltammetry, Glutathione, Gold nanoparticles, Graphite electrode",

author = "Perevezentseva, {D. O.} and Skirdin, {K. V.} and Gorchakov, {E. V.} and Bimatov, {V. I.}",

year = "2015",

doi = "10.13005/ojc/310226",

language = "English",

volume = "31",

pages = "834--844",

journal = "Oriental Journal of Chemistry",

issn = "0970-020X",

publisher = "Bhopal, S.A. Iqbal",

number = "2",

}

TY - JOUR

T1 - Electrochemical activity of glutathione at a graphite electrode modified with gold nanoparticles

AU - Perevezentseva, D. O.

AU - Skirdin, K. V.

AU - Gorchakov, E. V.

AU - Bimatov, V. I.

PY - 2015

Y1 - 2015

N2 - The electrochemical activity of the glutathione (GSH) at the graphite electrodes modified with gold nanoparticles (AuNP-GCE) is formed under the ratio of reactants and in solutions of supporting electrolytes of 0, 1 M NaOH, 0,1 "phosphate buffer (pH 6.86), 0,1 M HCl, 0,1 M NaClO4 is studied by the method of cyclic voltammetry. The dependence of the electrochemical activity of GSH on ratio of reagents HAuCl4:Na3C6H5O7:NaBH4, used to the preparation of sols, and the modification time of the GE surface with gold nanoparticles have been studied. The "inverse" cathodic peak of GSH at AuNPGCE formed in the reaction mixture HAuCl4:Na3C6H5O7:NaBH4= 1:1:4 is observed on the cathodic branch of cyclic voltammogram at Ec = 0.05 V in 0.1 M NaOH. The mechanism of electrochemical oxidation of the GSH on the surface of AuNP-GCE in 0.1 M NaOH is proposed.

AB - The electrochemical activity of the glutathione (GSH) at the graphite electrodes modified with gold nanoparticles (AuNP-GCE) is formed under the ratio of reactants and in solutions of supporting electrolytes of 0, 1 M NaOH, 0,1 "phosphate buffer (pH 6.86), 0,1 M HCl, 0,1 M NaClO4 is studied by the method of cyclic voltammetry. The dependence of the electrochemical activity of GSH on ratio of reagents HAuCl4:Na3C6H5O7:NaBH4, used to the preparation of sols, and the modification time of the GE surface with gold nanoparticles have been studied. The "inverse" cathodic peak of GSH at AuNPGCE formed in the reaction mixture HAuCl4:Na3C6H5O7:NaBH4= 1:1:4 is observed on the cathodic branch of cyclic voltammogram at Ec = 0.05 V in 0.1 M NaOH. The mechanism of electrochemical oxidation of the GSH on the surface of AuNP-GCE in 0.1 M NaOH is proposed.

KW - Cyclic voltammetry

KW - Glutathione

KW - Gold nanoparticles

KW - Graphite electrode

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U2 - 10.13005/ojc/310226

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JO - Oriental Journal of Chemistry

JF - Oriental Journal of Chemistry

SN - 0970-020X

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