Influential factors on oxygen reduction at La1-xCaxCoO3 electrodes in alkaline electrolyte
Identifieur interne :
000171 ( PascalFrancis/Corpus );
précédent :
000170;
suivant :
000172
Influential factors on oxygen reduction at La1-xCaxCoO3 electrodes in alkaline electrolyte
Auteurs : Abderrezak Hammouche ;
Abdelkrim Kahoul ;
Dirk Uwe Sauer ;
Rik W. De DonckerSource :
-
Journal of power sources [ 0378-7753 ] ; 2006.
RBID : Pascal:06-0258447
Descripteurs français
English descriptors
Abstract
Reduction of oxygen was investigated on porous electrodes made of La1-xCaxCoO3 (with 0 ≤ x ≤ 0.6) perovskite-structured oxides, prepared by a sol-gel process. It was found that both the reaction rate and the electrode active surface area (determined by cyclic voltammetry in a narrow capacitive potential range and by impedance spectroscopy) depend on the partial substitution ratio x, both displaying a maximum value for x nearly equal to 0.4. However, in spite of the parallel trend exhibited by the reduction current and the electroactive surface area parameter, the current varies much more with x, that is, while the change in the surface area amounts to approximately 40% over the explored x range, the current increases fivefold. Subsequent investigation of the electrode surface composition revealed that surface cobalt concentration (estimated by XPS analysis) deviates significantly from the nominal bulk composition (determined by EDX analysis). It follows a similar dependence on x, showing equally a maximum for x near to 0.4. Such a behaviour seems to have a greater effect on the reaction rate, since Co cations are the surface active sites for oxygen electro-reduction.
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Pour connaître la documentation sur le format Inist Standard.
| pA |
| A01 | 01 | 1 | | @0 0378-7753 |
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| A02 | 01 | | | @0 JPSODZ |
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| A03 | | 1 | | @0 J. power sources |
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| A05 | | | | @2 153 |
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| A06 | | | | @2 2 |
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| A08 | 01 | 1 | ENG | @1 Influential factors on oxygen reduction at La1-xCaxCoO3 electrodes in alkaline electrolyte |
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| A09 | 01 | 1 | ENG | @1 Selected papers presented at the 2004 Meeting of the International Battery Association (IBA), Graz, Austria, 18-22 April, 2004 |
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| A11 | 01 | 1 | | @1 HAMMOUCHE (Abderrezak) |
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| A11 | 02 | 1 | | @1 KAHOUL (Abdelkrim) |
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| A11 | 03 | 1 | | @1 SAUER (Dirk Uwe) |
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| A11 | 04 | 1 | | @1 DE DONCKER (Rik W.) |
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| A12 | 01 | 1 | | @1 BESENHARD (J. O.) @9 ed. |
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| A12 | 02 | 1 | | @1 MÖLLER (K.-C.) @9 ed. |
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| A12 | 03 | 1 | | @1 WINTER (M.) @9 ed. |
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| A12 | 04 | 1 | | @1 YAZAMI (R.) @9 ed. |
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| A14 | 01 | | | @1 Electrochemical Energy Conversion and Storage Systems Group, Institute for Power Electronics and Electrical Drives, Aachen University of Technology, Jägerstrasse. 17-19 @2 52066 Aachen @3 DEU @Z 1 aut. @Z 3 aut. @Z 4 aut. |
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| A14 | 02 | | | @1 Laboratory for Energetics and Electrochemistry of Solids, Department of Process Engineering, F. Abbas University of Setif @2 19000 Setif @3 DZA @Z 2 aut. |
|---|
| A15 | 01 | | | @1 Graz University of Technology, Stremayrgasse 16 @2 8010 Graz @3 AUT @Z 1 aut. |
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| A18 | 01 | 1 | | @1 International Battery Association (IBA) @3 INT @9 patr. |
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| A20 | | | | @1 239-244 |
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| A21 | | | | @1 2006 |
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| A23 | 01 | | | @0 ENG |
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| A43 | 01 | | | @1 INIST @2 17113 @5 354000153369520060 |
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| A44 | | | | @0 0000 @1 © 2006 INIST-CNRS. All rights reserved. |
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| A45 | | | | @0 18 ref. |
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| A47 | 01 | 1 | | @0 06-0258447 |
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| A60 | | | | @1 P @2 C @3 CC |
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| A61 | | | | @0 A |
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| A64 | 01 | 1 | | @0 Journal of power sources |
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| A66 | 01 | | | @0 CHE |
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| C01 | 01 | | ENG | @0 Reduction of oxygen was investigated on porous electrodes made of La1-xCaxCoO3 (with 0 ≤ x ≤ 0.6) perovskite-structured oxides, prepared by a sol-gel process. It was found that both the reaction rate and the electrode active surface area (determined by cyclic voltammetry in a narrow capacitive potential range and by impedance spectroscopy) depend on the partial substitution ratio x, both displaying a maximum value for x nearly equal to 0.4. However, in spite of the parallel trend exhibited by the reduction current and the electroactive surface area parameter, the current varies much more with x, that is, while the change in the surface area amounts to approximately 40% over the explored x range, the current increases fivefold. Subsequent investigation of the electrode surface composition revealed that surface cobalt concentration (estimated by XPS analysis) deviates significantly from the nominal bulk composition (determined by EDX analysis). It follows a similar dependence on x, showing equally a maximum for x near to 0.4. Such a behaviour seems to have a greater effect on the reaction rate, since Co cations are the surface active sites for oxygen electro-reduction. |
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| C02 | 01 | X | | @0 001D06D03E |
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| C02 | 02 | X | | @0 001D05I03E |
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| C02 | 03 | X | | @0 230 |
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| C03 | 01 | X | FRE | @0 Pile combustible @5 05 |
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| C03 | 01 | X | ENG | @0 Fuel cell @5 05 |
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| C03 | 01 | X | SPA | @0 Pila combustión @5 05 |
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| C03 | 02 | 3 | FRE | @0 Batterie électrique @5 06 |
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| C03 | 02 | 3 | ENG | @0 Electric batteries @5 06 |
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| C03 | 03 | X | FRE | @0 Electrode poreuse @5 07 |
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| C03 | 03 | X | ENG | @0 Porous electrode @5 07 |
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| C03 | 03 | X | SPA | @0 Electrodo poroso @5 07 |
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| C03 | 04 | X | FRE | @0 Lanthane Calcium Cobalt Oxyde @2 NC @2 FR @2 NA @5 08 |
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| C03 | 04 | X | ENG | @0 Lanthanum Calcium Cobalt Oxides @2 NC @2 FR @2 NA @5 08 |
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| C03 | 04 | X | SPA | @0 Lantano Calcio Cobalto Óxido @2 NC @2 FR @2 NA @5 08 |
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| C03 | 05 | X | FRE | @0 Réduction chimique @5 09 |
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| C03 | 05 | X | ENG | @0 Chemical reduction @5 09 |
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| C03 | 05 | X | SPA | @0 Reducción química @5 09 |
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| C03 | 06 | X | FRE | @0 Voltammétrie cyclique @5 10 |
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| C03 | 06 | X | ENG | @0 Cyclic voltammetry @5 10 |
|---|
| C03 | 06 | X | SPA | @0 Voltametría cíclica @5 10 |
|---|
| C03 | 07 | 3 | FRE | @0 Spectrométrie impédance électrochimique @5 11 |
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| C03 | 07 | 3 | ENG | @0 Electrochemical impedance spectroscopy @5 11 |
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| N21 | | | | @1 163 |
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|
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| pR |
| A30 | 01 | 1 | ENG | @1 Meeting of the International Battery Association @3 Graz AUT @4 2004-04-18 |
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Format Inist (serveur)
| NO : | PASCAL 06-0258447 INIST |
|---|
| ET : | Influential factors on oxygen reduction at La1-xCaxCoO3 electrodes in alkaline electrolyte |
|---|
| AU : | HAMMOUCHE (Abderrezak); KAHOUL (Abdelkrim); SAUER (Dirk Uwe); DE DONCKER (Rik W.); BESENHARD (J. O.); MÖLLER (K.-C.); WINTER (M.); YAZAMI (R.) |
|---|
| AF : | Electrochemical Energy Conversion and Storage Systems Group, Institute for Power Electronics and Electrical Drives, Aachen University of Technology, Jägerstrasse. 17-19/52066 Aachen/Allemagne (1 aut., 3 aut., 4 aut.); Laboratory for Energetics and Electrochemistry of Solids, Department of Process Engineering, F. Abbas University of Setif/19000 Setif/Algérie (2 aut.); Graz University of Technology, Stremayrgasse 16/8010 Graz/Autriche (1 aut.) |
|---|
| DT : | Publication en série; Congrès; Courte communication, note brève; Niveau analytique |
|---|
| SO : | Journal of power sources; ISSN 0378-7753; Coden JPSODZ; Suisse; Da. 2006; Vol. 153; No. 2; Pp. 239-244; Bibl. 18 ref. |
|---|
| LA : | Anglais |
|---|
| EA : | Reduction of oxygen was investigated on porous electrodes made of La1-xCaxCoO3 (with 0 ≤ x ≤ 0.6) perovskite-structured oxides, prepared by a sol-gel process. It was found that both the reaction rate and the electrode active surface area (determined by cyclic voltammetry in a narrow capacitive potential range and by impedance spectroscopy) depend on the partial substitution ratio x, both displaying a maximum value for x nearly equal to 0.4. However, in spite of the parallel trend exhibited by the reduction current and the electroactive surface area parameter, the current varies much more with x, that is, while the change in the surface area amounts to approximately 40% over the explored x range, the current increases fivefold. Subsequent investigation of the electrode surface composition revealed that surface cobalt concentration (estimated by XPS analysis) deviates significantly from the nominal bulk composition (determined by EDX analysis). It follows a similar dependence on x, showing equally a maximum for x near to 0.4. Such a behaviour seems to have a greater effect on the reaction rate, since Co cations are the surface active sites for oxygen electro-reduction. |
|---|
| CC : | 001D06D03E; 001D05I03E; 230 |
|---|
| FD : | Pile combustible; Batterie électrique; Electrode poreuse; Lanthane Calcium Cobalt Oxyde; Réduction chimique; Voltammétrie cyclique; Spectrométrie impédance électrochimique |
|---|
| ED : | Fuel cell; Electric batteries; Porous electrode; Lanthanum Calcium Cobalt Oxides; Chemical reduction; Cyclic voltammetry; Electrochemical impedance spectroscopy |
|---|
| SD : | Pila combustión; Electrodo poroso; Lantano Calcio Cobalto Óxido; Reducción química; Voltametría cíclica |
|---|
| LO : | INIST-17113.354000153369520060 |
|---|
| ID : | 06-0258447 |
|---|
Links to Exploration step
Pascal:06-0258447
Le document en format XML
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Ca<sub>x</sub>
CoO<sub>3</sub>
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Ca<sub>x</sub>
CoO<sub>3</sub>
electrodes in alkaline electrolyte</title><author><name sortKey="Hammouche, Abderrezak" sort="Hammouche, Abderrezak" uniqKey="Hammouche A" first="Abderrezak" last="Hammouche">Abderrezak Hammouche</name>
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</inist:fA14><author><name sortKey="Kahoul, Abdelkrim" sort="Kahoul, Abdelkrim" uniqKey="Kahoul A" first="Abdelkrim" last="Kahoul">Abdelkrim Kahoul</name>
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<s2>52066 Aachen</s2>
<s3>DEU</s3>
<sZ>1 aut.</sZ>
<sZ>3 aut.</sZ>
<sZ>4 aut.</sZ>
</inist:fA14><author><name sortKey="De Doncker, Rik W" sort="De Doncker, Rik W" uniqKey="De Doncker R" first="Rik W." last="De Doncker">Rik W. De Doncker</name>
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<s2>52066 Aachen</s2>
<s3>DEU</s3>
<sZ>1 aut.</sZ>
<sZ>3 aut.</sZ>
<sZ>4 aut.</sZ>
</inist:fA14><series><title level="j" type="main">Journal of power sources</title>
<title level="j" type="abbreviated">J. power sources</title>
<idno type="ISSN">0378-7753</idno>
<imprint><date when="2006">2006</date>
</imprint><seriesStmt><title level="j" type="main">Journal of power sources</title>
<title level="j" type="abbreviated">J. power sources</title>
<idno type="ISSN">0378-7753</idno>
</seriesStmt><profileDesc><textClass><keywords scheme="KwdEn" xml:lang="en"><term>Chemical reduction</term>
<term>Cyclic voltammetry</term>
<term>Electric batteries</term>
<term>Electrochemical impedance spectroscopy</term>
<term>Fuel cell</term>
<term>Lanthanum Calcium Cobalt Oxides</term>
<term>Porous electrode</term>
</keywords><keywords scheme="Pascal" xml:lang="fr"><term>Pile combustible</term>
<term>Batterie électrique</term>
<term>Electrode poreuse</term>
<term>Lanthane Calcium Cobalt Oxyde</term>
<term>Réduction chimique</term>
<term>Voltammétrie cyclique</term>
<term>Spectrométrie impédance électrochimique</term>
</keywords><front><div type="abstract" xml:lang="en">Reduction of oxygen was investigated on porous electrodes made of La<sub>1-x</sub>
Ca<sub>x</sub>
CoO<sub>3</sub>
(with 0 ≤ x ≤ 0.6) perovskite-structured oxides, prepared by a sol-gel process. It was found that both the reaction rate and the electrode active surface area (determined by cyclic voltammetry in a narrow capacitive potential range and by impedance spectroscopy) depend on the partial substitution ratio x, both displaying a maximum value for x nearly equal to 0.4. However, in spite of the parallel trend exhibited by the reduction current and the electroactive surface area parameter, the current varies much more with x, that is, while the change in the surface area amounts to approximately 40% over the explored x range, the current increases fivefold. Subsequent investigation of the electrode surface composition revealed that surface cobalt concentration (estimated by XPS analysis) deviates significantly from the nominal bulk composition (determined by EDX analysis). It follows a similar dependence on x, showing equally a maximum for x near to 0.4. Such a behaviour seems to have a greater effect on the reaction rate, since Co cations are the surface active sites for oxygen electro-reduction.</div><inist><standard h6="B"><pA><fA01 i1="01" i2="1"><s0>0378-7753</s0>
</fA01><fA02 i1="01"><s0>JPSODZ</s0>
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</fA03><fA05><s2>153</s2>
</fA05><fA08 i1="01" i2="1" l="ENG"><s1>Influential factors on oxygen reduction at La<sub>1-x</sub>
Ca<sub>x</sub>
CoO<sub>3</sub>
electrodes in alkaline electrolyte</s1><fA09 i1="01" i2="1" l="ENG"><s1>Selected papers presented at the 2004 Meeting of the International Battery Association (IBA), Graz, Austria, 18-22 April, 2004</s1>
</fA09><fA11 i1="01" i2="1"><s1>HAMMOUCHE (Abderrezak)</s1>
</fA11><fA11 i1="02" i2="1"><s1>KAHOUL (Abdelkrim)</s1>
</fA11><fA11 i1="03" i2="1"><s1>SAUER (Dirk Uwe)</s1>
</fA11><fA11 i1="04" i2="1"><s1>DE DONCKER (Rik W.)</s1>
</fA11><fA12 i1="01" i2="1"><s1>BESENHARD (J. O.)</s1>
<s9>ed.</s9>
</fA12><fA12 i1="02" i2="1"><s1>MÖLLER (K.-C.)</s1>
<s9>ed.</s9>
</fA12><fA12 i1="03" i2="1"><s1>WINTER (M.)</s1>
<s9>ed.</s9>
</fA12><fA12 i1="04" i2="1"><s1>YAZAMI (R.)</s1>
<s9>ed.</s9>
</fA12><fA14 i1="01"><s1>Electrochemical Energy Conversion and Storage Systems Group, Institute for Power Electronics and Electrical Drives, Aachen University of Technology, Jägerstrasse. 17-19</s1>
<s2>52066 Aachen</s2>
<s3>DEU</s3>
<sZ>1 aut.</sZ>
<sZ>3 aut.</sZ>
<sZ>4 aut.</sZ>
</fA14><fA14 i1="02"><s1>Laboratory for Energetics and Electrochemistry of Solids, Department of Process Engineering, F. Abbas University of Setif</s1>
<s2>19000 Setif</s2>
<s3>DZA</s3>
<sZ>2 aut.</sZ>
</fA14><fA15 i1="01"><s1>Graz University of Technology, Stremayrgasse 16</s1>
<s2>8010 Graz</s2>
<s3>AUT</s3>
<sZ>1 aut.</sZ>
</fA15><fA18 i1="01" i2="1"><s1>International Battery Association (IBA)</s1>
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</fA20><fA21><s1>2006</s1>
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</fA45><fA47 i1="01" i2="1"><s0>06-0258447</s0>
</fA47><fA60><s1>P</s1>
<s2>C</s2>
<s3>CC</s3>
</fA60><fA64 i1="01" i2="1"><s0>Journal of power sources</s0>
</fA64><fA66 i1="01"><s0>CHE</s0>
</fA66><fC01 i1="01" l="ENG"><s0>Reduction of oxygen was investigated on porous electrodes made of La<sub>1-x</sub>
Ca<sub>x</sub>
CoO<sub>3</sub>
(with 0 ≤ x ≤ 0.6) perovskite-structured oxides, prepared by a sol-gel process. It was found that both the reaction rate and the electrode active surface area (determined by cyclic voltammetry in a narrow capacitive potential range and by impedance spectroscopy) depend on the partial substitution ratio x, both displaying a maximum value for x nearly equal to 0.4. However, in spite of the parallel trend exhibited by the reduction current and the electroactive surface area parameter, the current varies much more with x, that is, while the change in the surface area amounts to approximately 40% over the explored x range, the current increases fivefold. Subsequent investigation of the electrode surface composition revealed that surface cobalt concentration (estimated by XPS analysis) deviates significantly from the nominal bulk composition (determined by EDX analysis). It follows a similar dependence on x, showing equally a maximum for x near to 0.4. Such a behaviour seems to have a greater effect on the reaction rate, since Co cations are the surface active sites for oxygen electro-reduction.</s0><fC02 i1="01" i2="X"><s0>001D06D03E</s0>
</fC02><fC02 i1="02" i2="X"><s0>001D05I03E</s0>
</fC02><fC02 i1="03" i2="X"><s0>230</s0>
</fC02><fC03 i1="01" i2="X" l="FRE"><s0>Pile combustible</s0>
<s5>05</s5>
</fC03><fC03 i1="01" i2="X" l="ENG"><s0>Fuel cell</s0>
<s5>05</s5>
</fC03><fC03 i1="01" i2="X" l="SPA"><s0>Pila combustión</s0>
<s5>05</s5>
</fC03><fC03 i1="02" i2="3" l="FRE"><s0>Batterie électrique</s0>
<s5>06</s5>
</fC03><fC03 i1="02" i2="3" l="ENG"><s0>Electric batteries</s0>
<s5>06</s5>
</fC03><fC03 i1="03" i2="X" l="FRE"><s0>Electrode poreuse</s0>
<s5>07</s5>
</fC03><fC03 i1="03" i2="X" l="ENG"><s0>Porous electrode</s0>
<s5>07</s5>
</fC03><fC03 i1="03" i2="X" l="SPA"><s0>Electrodo poroso</s0>
<s5>07</s5>
</fC03><fC03 i1="04" i2="X" l="FRE"><s0>Lanthane Calcium Cobalt Oxyde</s0>
<s2>NC</s2>
<s2>FR</s2>
<s2>NA</s2>
<s5>08</s5>
</fC03><fC03 i1="04" i2="X" l="ENG"><s0>Lanthanum Calcium Cobalt Oxides</s0>
<s2>NC</s2>
<s2>FR</s2>
<s2>NA</s2>
<s5>08</s5>
</fC03><fC03 i1="04" i2="X" l="SPA"><s0>Lantano Calcio Cobalto Óxido</s0>
<s2>NC</s2>
<s2>FR</s2>
<s2>NA</s2>
<s5>08</s5>
</fC03><fC03 i1="05" i2="X" l="FRE"><s0>Réduction chimique</s0>
<s5>09</s5>
</fC03><fC03 i1="05" i2="X" l="ENG"><s0>Chemical reduction</s0>
<s5>09</s5>
</fC03><fC03 i1="05" i2="X" l="SPA"><s0>Reducción química</s0>
<s5>09</s5>
</fC03><fC03 i1="06" i2="X" l="FRE"><s0>Voltammétrie cyclique</s0>
<s5>10</s5>
</fC03><fC03 i1="06" i2="X" l="ENG"><s0>Cyclic voltammetry</s0>
<s5>10</s5>
</fC03><fC03 i1="06" i2="X" l="SPA"><s0>Voltametría cíclica</s0>
<s5>10</s5>
</fC03><fC03 i1="07" i2="3" l="FRE"><s0>Spectrométrie impédance électrochimique</s0>
<s5>11</s5>
</fC03><fC03 i1="07" i2="3" l="ENG"><s0>Electrochemical impedance spectroscopy</s0>
<s5>11</s5>
</fC03><fN21><s1>163</s1>
</fN21><pR><fA30 i1="01" i2="1" l="ENG"><s1>Meeting of the International Battery Association</s1>
<s3>Graz AUT</s3>
<s4>2004-04-18</s4>
</fA30><server><NO>PASCAL 06-0258447 INIST</NO>
<ET>Influential factors on oxygen reduction at La<sub>1-x</sub>
Ca<sub>x</sub>
CoO<sub>3</sub>
electrodes in alkaline electrolyte</ET><AU>HAMMOUCHE (Abderrezak); KAHOUL (Abdelkrim); SAUER (Dirk Uwe); DE DONCKER (Rik W.); BESENHARD (J. O.); MÖLLER (K.-C.); WINTER (M.); YAZAMI (R.)</AU>
<AF>Electrochemical Energy Conversion and Storage Systems Group, Institute for Power Electronics and Electrical Drives, Aachen University of Technology, Jägerstrasse. 17-19/52066 Aachen/Allemagne (1 aut., 3 aut., 4 aut.); Laboratory for Energetics and Electrochemistry of Solids, Department of Process Engineering, F. Abbas University of Setif/19000 Setif/Algérie (2 aut.); Graz University of Technology, Stremayrgasse 16/8010 Graz/Autriche (1 aut.)</AF>
<DT>Publication en série; Congrès; Courte communication, note brève; Niveau analytique</DT>
<SO>Journal of power sources; ISSN 0378-7753; Coden JPSODZ; Suisse; Da. 2006; Vol. 153; No. 2; Pp. 239-244; Bibl. 18 ref.</SO>
<LA>Anglais</LA>
<EA>Reduction of oxygen was investigated on porous electrodes made of La<sub>1-x</sub>
Ca<sub>x</sub>
CoO<sub>3</sub>
(with 0 ≤ x ≤ 0.6) perovskite-structured oxides, prepared by a sol-gel process. It was found that both the reaction rate and the electrode active surface area (determined by cyclic voltammetry in a narrow capacitive potential range and by impedance spectroscopy) depend on the partial substitution ratio x, both displaying a maximum value for x nearly equal to 0.4. However, in spite of the parallel trend exhibited by the reduction current and the electroactive surface area parameter, the current varies much more with x, that is, while the change in the surface area amounts to approximately 40% over the explored x range, the current increases fivefold. Subsequent investigation of the electrode surface composition revealed that surface cobalt concentration (estimated by XPS analysis) deviates significantly from the nominal bulk composition (determined by EDX analysis). It follows a similar dependence on x, showing equally a maximum for x near to 0.4. Such a behaviour seems to have a greater effect on the reaction rate, since Co cations are the surface active sites for oxygen electro-reduction.</EA><CC>001D06D03E; 001D05I03E; 230</CC>
<FD>Pile combustible; Batterie électrique; Electrode poreuse; Lanthane Calcium Cobalt Oxyde; Réduction chimique; Voltammétrie cyclique; Spectrométrie impédance électrochimique</FD>
<ED>Fuel cell; Electric batteries; Porous electrode; Lanthanum Calcium Cobalt Oxides; Chemical reduction; Cyclic voltammetry; Electrochemical impedance spectroscopy</ED>
<SD>Pila combustión; Electrodo poroso; Lantano Calcio Cobalto Óxido; Reducción química; Voltametría cíclica</SD>
<LO>INIST-17113.354000153369520060</LO>
<ID>06-0258447</ID>
</server>
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