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Electrocatalytic oxidation of thiocholine at chemically modified cobalt hexacyanoferrate screen-printed electrodes

Identifieur interne : 000112 ( PascalFrancis/Checkpoint ); précédent : 000111; suivant : 000113

Electrocatalytic oxidation of thiocholine at chemically modified cobalt hexacyanoferrate screen-printed electrodes

Auteurs : Fabiana Arduini [Italie] ; Alessio Cassisi [Italie] ; Aziz Amine [Maroc] ; Francesco Ricci [Italie] ; Danila Moscone [Italie] ; Giuseppe Palleschi [Italie]

Source :

RBID : Pascal:09-0184855

Descripteurs français

English descriptors

Abstract

In this work, cobalt hexacyanoferrate (CoHCF) modified screen-printed electrodes were developed and characterised electrochemically. The effect of different cations was investigated showing a more reversible system with a well-defined peak around +0.35 V vs. Ag/AgCl when Na+ was used as cation in the supporting electrolyte. The transfer coefficient (α) and the apparent charge transfer rate constant (ks) for electron transfer between the electrode and the CoHCF layer was calculated. The electrocatalytic behaviour of CoHCF towards oxidation of enzymatically generated thiocholine was thoroughly investigated. Cyclic voltammetry experiments performed in thiocholine solution showed the classical shape of mediated redox system. The diffusion constant of thiocholine was estimated using chronoamperometry. Also, the catalytic rate constant k of thiocholine at CoHCF-SPE was determined. The current due to thiocholine mediated oxidation was then evaluated in batch amperometric mode at +0.5 V vs. Ag/AgCl obtaining a linear range (5 × 10-7-1 × 10-5 mol L-1) with a low detection limit and a high sensitivity equal to 5 x 10-7 mol L-1 and 435 mA mol-1 L cm-2, respectively.


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Pascal:09-0184855

Le document en format XML

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<term>Buffer solution</term>
<term>Cobalt Hexacyanoferrates</term>
<term>Electrocatalysis</term>
<term>Electrocatalysts</term>
<term>Electrochemical detector</term>
<term>Electrochemical reaction</term>
<term>Electrodes</term>
<term>Lithium Chlorides</term>
<term>Modified material</term>
<term>Oxidation</term>
<term>Phosphates</term>
<term>Potassium Chlorides</term>
<term>Serigraphy</term>
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<term>Electrocatalyse</term>
<term>Oxydation</term>
<term>Cobalt Hexacyanoferrate</term>
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<term>Sérigraphie</term>
<term>Electrode</term>
<term>Détecteur électrochimique</term>
<term>Matériau modifié</term>
<term>Sodium Chlorure</term>
<term>Lithium Chlorure</term>
<term>Potassium Chlorure</term>
<term>Solution tampon</term>
<term>Phosphate</term>
<term>Réaction électrochimique</term>
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<div type="abstract" xml:lang="en">In this work, cobalt hexacyanoferrate (CoHCF) modified screen-printed electrodes were developed and characterised electrochemically. The effect of different cations was investigated showing a more reversible system with a well-defined peak around +0.35 V vs. Ag/AgCl when Na
<sup>+</sup>
was used as cation in the supporting electrolyte. The transfer coefficient (α) and the apparent charge transfer rate constant (k
<sub>s</sub>
) for electron transfer between the electrode and the CoHCF layer was calculated. The electrocatalytic behaviour of CoHCF towards oxidation of enzymatically generated thiocholine was thoroughly investigated. Cyclic voltammetry experiments performed in thiocholine solution showed the classical shape of mediated redox system. The diffusion constant of thiocholine was estimated using chronoamperometry. Also, the catalytic rate constant k of thiocholine at CoHCF-SPE was determined. The current due to thiocholine mediated oxidation was then evaluated in batch amperometric mode at +0.5 V vs. Ag/AgCl obtaining a linear range (5 × 10
<sup>-7</sup>
-1 × 10
<sup>-5</sup>
mol L
<sup>-1</sup>
) with a low detection limit and a high sensitivity equal to 5 x 10
<sup>-7</sup>
mol L
<sup>-1</sup>
and 435 mA mol
<sup>-1</sup>
L cm
<sup>-2</sup>
, respectively.</div>
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<s1>Faculté de Sciences et Techniques de Mohammadia, B.P. 146</s1>
<s2>Mohammadia</s2>
<s3>MAR</s3>
<sZ>3 aut.</sZ>
</fA14>
<fA20>
<s1>66-74</s1>
</fA20>
<fA21>
<s1>2009</s1>
</fA21>
<fA23 i1="01">
<s0>ENG</s0>
</fA23>
<fA43 i1="01">
<s1>INIST</s1>
<s2>1150</s2>
<s5>354000184223950100</s5>
</fA43>
<fA44>
<s0>0000</s0>
<s1>© 2009 INIST-CNRS. All rights reserved.</s1>
</fA44>
<fA45>
<s0>40 ref.</s0>
</fA45>
<fA47 i1="01" i2="1">
<s0>09-0184855</s0>
</fA47>
<fA60>
<s1>P</s1>
</fA60>
<fA61>
<s0>A</s0>
</fA61>
<fA64 i1="01" i2="1">
<s0>Journal of electroanalytical chemistry : (1992)</s0>
</fA64>
<fA66 i1="01">
<s0>NLD</s0>
</fA66>
<fC01 i1="01" l="ENG">
<s0>In this work, cobalt hexacyanoferrate (CoHCF) modified screen-printed electrodes were developed and characterised electrochemically. The effect of different cations was investigated showing a more reversible system with a well-defined peak around +0.35 V vs. Ag/AgCl when Na
<sup>+</sup>
was used as cation in the supporting electrolyte. The transfer coefficient (α) and the apparent charge transfer rate constant (k
<sub>s</sub>
) for electron transfer between the electrode and the CoHCF layer was calculated. The electrocatalytic behaviour of CoHCF towards oxidation of enzymatically generated thiocholine was thoroughly investigated. Cyclic voltammetry experiments performed in thiocholine solution showed the classical shape of mediated redox system. The diffusion constant of thiocholine was estimated using chronoamperometry. Also, the catalytic rate constant k of thiocholine at CoHCF-SPE was determined. The current due to thiocholine mediated oxidation was then evaluated in batch amperometric mode at +0.5 V vs. Ag/AgCl obtaining a linear range (5 × 10
<sup>-7</sup>
-1 × 10
<sup>-5</sup>
mol L
<sup>-1</sup>
) with a low detection limit and a high sensitivity equal to 5 x 10
<sup>-7</sup>
mol L
<sup>-1</sup>
and 435 mA mol
<sup>-1</sup>
L cm
<sup>-2</sup>
, respectively.</s0>
</fC01>
<fC02 i1="01" i2="X">
<s0>001C04E</s0>
</fC02>
<fC03 i1="01" i2="X" l="FRE">
<s0>Electrocatalyse</s0>
<s5>01</s5>
</fC03>
<fC03 i1="01" i2="X" l="ENG">
<s0>Electrocatalysis</s0>
<s5>01</s5>
</fC03>
<fC03 i1="01" i2="X" l="SPA">
<s0>Electrocatálisis</s0>
<s5>01</s5>
</fC03>
<fC03 i1="02" i2="X" l="FRE">
<s0>Oxydation</s0>
<s5>02</s5>
</fC03>
<fC03 i1="02" i2="X" l="ENG">
<s0>Oxidation</s0>
<s5>02</s5>
</fC03>
<fC03 i1="02" i2="X" l="SPA">
<s0>Oxidación</s0>
<s5>02</s5>
</fC03>
<fC03 i1="03" i2="X" l="FRE">
<s0>Cobalt Hexacyanoferrate</s0>
<s2>NC</s2>
<s2>NA</s2>
<s5>03</s5>
</fC03>
<fC03 i1="03" i2="X" l="ENG">
<s0>Cobalt Hexacyanoferrates</s0>
<s2>NC</s2>
<s2>NA</s2>
<s5>03</s5>
</fC03>
<fC03 i1="03" i2="X" l="SPA">
<s0>Cobalto Hexacianoferrato</s0>
<s2>NC</s2>
<s2>NA</s2>
<s5>03</s5>
</fC03>
<fC03 i1="04" i2="3" l="FRE">
<s0>Electrocatalyseur</s0>
<s5>04</s5>
</fC03>
<fC03 i1="04" i2="3" l="ENG">
<s0>Electrocatalysts</s0>
<s5>04</s5>
</fC03>
<fC03 i1="05" i2="X" l="FRE">
<s0>Sérigraphie</s0>
<s5>05</s5>
</fC03>
<fC03 i1="05" i2="X" l="ENG">
<s0>Serigraphy</s0>
<s5>05</s5>
</fC03>
<fC03 i1="05" i2="X" l="SPA">
<s0>Serigrafía</s0>
<s5>05</s5>
</fC03>
<fC03 i1="06" i2="X" l="FRE">
<s0>Electrode</s0>
<s5>06</s5>
</fC03>
<fC03 i1="06" i2="X" l="ENG">
<s0>Electrodes</s0>
<s5>06</s5>
</fC03>
<fC03 i1="06" i2="X" l="SPA">
<s0>Electrodo</s0>
<s5>06</s5>
</fC03>
<fC03 i1="07" i2="X" l="FRE">
<s0>Détecteur électrochimique</s0>
<s5>07</s5>
</fC03>
<fC03 i1="07" i2="X" l="ENG">
<s0>Electrochemical detector</s0>
<s5>07</s5>
</fC03>
<fC03 i1="07" i2="X" l="SPA">
<s0>Detector electroquímico</s0>
<s5>07</s5>
</fC03>
<fC03 i1="08" i2="X" l="FRE">
<s0>Matériau modifié</s0>
<s5>08</s5>
</fC03>
<fC03 i1="08" i2="X" l="ENG">
<s0>Modified material</s0>
<s5>08</s5>
</fC03>
<fC03 i1="08" i2="X" l="SPA">
<s0>Material modificado</s0>
<s5>08</s5>
</fC03>
<fC03 i1="09" i2="X" l="FRE">
<s0>Sodium Chlorure</s0>
<s2>NC</s2>
<s2>NA</s2>
<s5>09</s5>
</fC03>
<fC03 i1="09" i2="X" l="ENG">
<s0>Sodium Chlorides</s0>
<s2>NC</s2>
<s2>NA</s2>
<s5>09</s5>
</fC03>
<fC03 i1="09" i2="X" l="SPA">
<s0>Sodio Cloruro</s0>
<s2>NC</s2>
<s2>NA</s2>
<s5>09</s5>
</fC03>
<fC03 i1="10" i2="X" l="FRE">
<s0>Lithium Chlorure</s0>
<s2>NC</s2>
<s2>NA</s2>
<s5>10</s5>
</fC03>
<fC03 i1="10" i2="X" l="ENG">
<s0>Lithium Chlorides</s0>
<s2>NC</s2>
<s2>NA</s2>
<s5>10</s5>
</fC03>
<fC03 i1="10" i2="X" l="SPA">
<s0>Litio Cloruro</s0>
<s2>NC</s2>
<s2>NA</s2>
<s5>10</s5>
</fC03>
<fC03 i1="11" i2="X" l="FRE">
<s0>Potassium Chlorure</s0>
<s2>NC</s2>
<s2>FR</s2>
<s2>NA</s2>
<s5>11</s5>
</fC03>
<fC03 i1="11" i2="X" l="ENG">
<s0>Potassium Chlorides</s0>
<s2>NC</s2>
<s2>FR</s2>
<s2>NA</s2>
<s5>11</s5>
</fC03>
<fC03 i1="11" i2="X" l="SPA">
<s0>Potasio Cloruro</s0>
<s2>NC</s2>
<s2>FR</s2>
<s2>NA</s2>
<s5>11</s5>
</fC03>
<fC03 i1="12" i2="X" l="FRE">
<s0>Solution tampon</s0>
<s5>12</s5>
</fC03>
<fC03 i1="12" i2="X" l="ENG">
<s0>Buffer solution</s0>
<s5>12</s5>
</fC03>
<fC03 i1="12" i2="X" l="SPA">
<s0>Solución de amortiguación</s0>
<s5>12</s5>
</fC03>
<fC03 i1="13" i2="X" l="FRE">
<s0>Phosphate</s0>
<s2>NA</s2>
<s5>13</s5>
</fC03>
<fC03 i1="13" i2="X" l="ENG">
<s0>Phosphates</s0>
<s2>NA</s2>
<s5>13</s5>
</fC03>
<fC03 i1="13" i2="X" l="SPA">
<s0>Fosfato</s0>
<s2>NA</s2>
<s5>13</s5>
</fC03>
<fC03 i1="14" i2="X" l="FRE">
<s0>Réaction électrochimique</s0>
<s5>32</s5>
</fC03>
<fC03 i1="14" i2="X" l="ENG">
<s0>Electrochemical reaction</s0>
<s5>32</s5>
</fC03>
<fC03 i1="14" i2="X" l="SPA">
<s0>Reacción electroquímica</s0>
<s5>32</s5>
</fC03>
<fC03 i1="15" i2="X" l="FRE">
<s0>Thiocholine</s0>
<s2>NK</s2>
<s4>INC</s4>
<s5>76</s5>
</fC03>
<fN21>
<s1>138</s1>
</fN21>
</pA>
</standard>
</inist>
<affiliations>
<list>
<country>
<li>Italie</li>
<li>Maroc</li>
</country>
<region>
<li>Latium</li>
</region>
<settlement>
<li>Rome</li>
</settlement>
</list>
<tree>
<country name="Italie">
<region name="Latium">
<name sortKey="Arduini, Fabiana" sort="Arduini, Fabiana" uniqKey="Arduini F" first="Fabiana" last="Arduini">Fabiana Arduini</name>
</region>
<name sortKey="Arduini, Fabiana" sort="Arduini, Fabiana" uniqKey="Arduini F" first="Fabiana" last="Arduini">Fabiana Arduini</name>
<name sortKey="Cassisi, Alessio" sort="Cassisi, Alessio" uniqKey="Cassisi A" first="Alessio" last="Cassisi">Alessio Cassisi</name>
<name sortKey="Cassisi, Alessio" sort="Cassisi, Alessio" uniqKey="Cassisi A" first="Alessio" last="Cassisi">Alessio Cassisi</name>
<name sortKey="Moscone, Danila" sort="Moscone, Danila" uniqKey="Moscone D" first="Danila" last="Moscone">Danila Moscone</name>
<name sortKey="Moscone, Danila" sort="Moscone, Danila" uniqKey="Moscone D" first="Danila" last="Moscone">Danila Moscone</name>
<name sortKey="Palleschi, Giuseppe" sort="Palleschi, Giuseppe" uniqKey="Palleschi G" first="Giuseppe" last="Palleschi">Giuseppe Palleschi</name>
<name sortKey="Palleschi, Giuseppe" sort="Palleschi, Giuseppe" uniqKey="Palleschi G" first="Giuseppe" last="Palleschi">Giuseppe Palleschi</name>
<name sortKey="Ricci, Francesco" sort="Ricci, Francesco" uniqKey="Ricci F" first="Francesco" last="Ricci">Francesco Ricci</name>
<name sortKey="Ricci, Francesco" sort="Ricci, Francesco" uniqKey="Ricci F" first="Francesco" last="Ricci">Francesco Ricci</name>
</country>
<country name="Maroc">
<noRegion>
<name sortKey="Amine, Aziz" sort="Amine, Aziz" uniqKey="Amine A" first="Aziz" last="Amine">Aziz Amine</name>
</noRegion>
</country>
</tree>
</affiliations>
</record>

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