PREPARATION OF MANGANESE DIOXIDE MODIFIED GLASSY CARBON ELECTRODE BY A NOVEL FILM PLATING/CYCLIC VOLTAMMETRY METHOD FOR H(2)0(2) DETECTION

Manganese dioxide modified glassy carbon electrode (Mn0(2)/GC) was prepared by a novel film plating/cyclic voltammetry method for the determination of H(2)0(2). A manganese film was first cathodically deposited on the surface of glassy carbon electrode from MnCl2 solution at the potential of-1.4 V v...

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Autores principales:	WEN-ZHI,LE, YOU-QIN,LIU, GUANG-QI,HU
Lenguaje:	English
Publicado:	Sociedad Chilena de Química 2009
Materias:	Manganese dioxide Film plating/Cyclic voltammetry Glassy carbon electrode Electrocatalysis
Acceso en línea:	http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0717-97072009000400009
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spelling	oai:scielo:S0717-970720090004000092010-04-15PREPARATION OF MANGANESE DIOXIDE MODIFIED GLASSY CARBON ELECTRODE BY A NOVEL FILM PLATING/CYCLIC VOLTAMMETRY METHOD FOR H(2)0(2) DETECTIONWEN-ZHI,LEYOU-QIN,LIUGUANG-QI,HU Manganese dioxide Film plating/Cyclic voltammetry Glassy carbon electrode Electrocatalysis Manganese dioxide modified glassy carbon electrode (Mn0(2)/GC) was prepared by a novel film plating/cyclic voltammetry method for the determination of H(2)0(2). A manganese film was first cathodically deposited on the surface of glassy carbon electrode from MnCl2 solution at the potential of-1.4 V versus Ag/ AgCl (satd. KC1), and then a well defined manganese dioxide was deposited on the surface of glassy carbon electrode by cyclic voltammetry at potential range -0.6 ~ 0.6 V, scan rate 100 mV s-1 in 0.1 mol L7¹ NaOH solution. The resulted modified electrode was characterized by cyclic voltammetry and scanning electron microscopy (SEM), which showed excellent electrocatalytic activity for the oxidation of H(2)0(2). The chronoamperometric detection of H(2)0(2) was carried out at 0.6 V in phosphate buffer solution pH 7.38 containing 0.1 mol L7¹ KC1 and the linear relationship of response current on H(2)0(2) concentration was obtained in the range from 4. Ixl0~10 to lxl0~-mol L-1 with a minimum detectable concentration of 3xl0~10 mol L7¹ [S/N (signal noise ratio) = 3]. The response time of the electrode to achieve 95% of the steady-state current was < 2 s. No measurable reduction in analytical performance of the modified electrode was found by storing the electrode in ambient conditions for 30 days. This modified electrode has many advantages such as simple preparation procedure, remarkable catalytic activity, good reproducibility and long term stability of signal response during hydrogen peroxide oxidation. The deposition of manganese dioxide on the surface of GC appears to be a highly efficient method for the development of a new class of sensitive, stable and reproducible hydrogen peroxide electrochemical sensor.info:eu-repo/semantics/openAccessSociedad Chilena de QuímicaJournal of the Chilean Chemical Society v.54 n.4 20092009-12-01text/htmlhttp://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0717-97072009000400009en10.4067/S0717-97072009000400009
institution	Scielo Chile
collection	Scielo Chile
language	English
topic	Manganese dioxide Film plating/Cyclic voltammetry Glassy carbon electrode Electrocatalysis
spellingShingle	Manganese dioxide Film plating/Cyclic voltammetry Glassy carbon electrode Electrocatalysis WEN-ZHI,LE YOU-QIN,LIU GUANG-QI,HU PREPARATION OF MANGANESE DIOXIDE MODIFIED GLASSY CARBON ELECTRODE BY A NOVEL FILM PLATING/CYCLIC VOLTAMMETRY METHOD FOR H(2)0(2) DETECTION
description	Manganese dioxide modified glassy carbon electrode (Mn0(2)/GC) was prepared by a novel film plating/cyclic voltammetry method for the determination of H(2)0(2). A manganese film was first cathodically deposited on the surface of glassy carbon electrode from MnCl2 solution at the potential of-1.4 V versus Ag/ AgCl (satd. KC1), and then a well defined manganese dioxide was deposited on the surface of glassy carbon electrode by cyclic voltammetry at potential range -0.6 ~ 0.6 V, scan rate 100 mV s-1 in 0.1 mol L7¹ NaOH solution. The resulted modified electrode was characterized by cyclic voltammetry and scanning electron microscopy (SEM), which showed excellent electrocatalytic activity for the oxidation of H(2)0(2). The chronoamperometric detection of H(2)0(2) was carried out at 0.6 V in phosphate buffer solution pH 7.38 containing 0.1 mol L7¹ KC1 and the linear relationship of response current on H(2)0(2) concentration was obtained in the range from 4. Ixl0~10 to lxl0~-mol L-1 with a minimum detectable concentration of 3xl0~10 mol L7¹ [S/N (signal noise ratio) = 3]. The response time of the electrode to achieve 95% of the steady-state current was < 2 s. No measurable reduction in analytical performance of the modified electrode was found by storing the electrode in ambient conditions for 30 days. This modified electrode has many advantages such as simple preparation procedure, remarkable catalytic activity, good reproducibility and long term stability of signal response during hydrogen peroxide oxidation. The deposition of manganese dioxide on the surface of GC appears to be a highly efficient method for the development of a new class of sensitive, stable and reproducible hydrogen peroxide electrochemical sensor.
author	WEN-ZHI,LE YOU-QIN,LIU GUANG-QI,HU
author_facet	WEN-ZHI,LE YOU-QIN,LIU GUANG-QI,HU
author_sort	WEN-ZHI,LE
title	PREPARATION OF MANGANESE DIOXIDE MODIFIED GLASSY CARBON ELECTRODE BY A NOVEL FILM PLATING/CYCLIC VOLTAMMETRY METHOD FOR H(2)0(2) DETECTION
title_short	PREPARATION OF MANGANESE DIOXIDE MODIFIED GLASSY CARBON ELECTRODE BY A NOVEL FILM PLATING/CYCLIC VOLTAMMETRY METHOD FOR H(2)0(2) DETECTION
title_full	PREPARATION OF MANGANESE DIOXIDE MODIFIED GLASSY CARBON ELECTRODE BY A NOVEL FILM PLATING/CYCLIC VOLTAMMETRY METHOD FOR H(2)0(2) DETECTION
title_fullStr	PREPARATION OF MANGANESE DIOXIDE MODIFIED GLASSY CARBON ELECTRODE BY A NOVEL FILM PLATING/CYCLIC VOLTAMMETRY METHOD FOR H(2)0(2) DETECTION
title_full_unstemmed	PREPARATION OF MANGANESE DIOXIDE MODIFIED GLASSY CARBON ELECTRODE BY A NOVEL FILM PLATING/CYCLIC VOLTAMMETRY METHOD FOR H(2)0(2) DETECTION
title_sort	preparation of manganese dioxide modified glassy carbon electrode by a novel film plating/cyclic voltammetry method for h(2)0(2) detection
publisher	Sociedad Chilena de Química
publishDate	2009
url	http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0717-97072009000400009
work_keys_str_mv	AT wenzhile preparationofmanganesedioxidemodifiedglassycarbonelectrodebyanovelfilmplatingcyclicvoltammetrymethodforh202detection AT youqinliu preparationofmanganesedioxidemodifiedglassycarbonelectrodebyanovelfilmplatingcyclicvoltammetrymethodforh202detection AT guangqihu preparationofmanganesedioxidemodifiedglassycarbonelectrodebyanovelfilmplatingcyclicvoltammetrymethodforh202detection
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PREPARATION OF MANGANESE DIOXIDE MODIFIED GLASSY CARBON ELECTRODE BY A NOVEL FILM PLATING/CYCLIC VOLTAMMETRY METHOD FOR H(2)0(2) DETECTION

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