CobaltMaghrebV1, Main, Exploration, bibRecord, 000631

Preparation of Co-Sn alloys by electroreduction of Co(II) and Sn(II) in molten LiCl-KCl

Identifieur interne : 000631 ( Main/Exploration ); précédent : 000630; suivant : 000632

Preparation of Co-Sn alloys by electroreduction of Co(II) and Sn(II) in molten LiCl-KCl

Auteurs : H. Groult [France] ; H. El Ghallali [France, Maroc] ; A. Barhoun [Maroc] ; E. Briot [France] ; L. Perrigaud [France] ; S. Hernandorena [France] ; F. Lantelme [France]

Source :

Electrochimica acta [ 0013-4686 ] ; 2010.

RBID : Pascal:10-0269538

Descripteurs français

Pascal (Inist)
- Potassium Chlorure, Lithium Chlorure, Réduction chimique, Cobalt alliage, Etain alliage, Sel fondu, Electrolyte fondu, Alliage binaire, Dépôt électrolytique, Cobalt II Composé, Etain II Composé, Effet température, Electrode, Carbone, Etat vitreux, Molybdène, Microscopie électronique balayage, Diffraction RX, Réaction électrochimique, Condition opératoire, Structure surface, Morphologie.
Wicri :
- topic : Carbone, Molybdène.

English descriptors

KwdEn :
- Binary alloy, Carbon, Chemical reduction, Cobalt II Compounds, Cobalt alloy, Electrochemical reaction, Electrodeposition, Electrodes, Glassy state, Lithium Chlorides, Molten electrolyte, Molten salt, Molybdenum, Morphology, Operating conditions, Potassium Chlorides, Scanning electron microscopy, Surface structure, Temperature effect, Tin II Compounds, Tin alloy, X ray diffraction.

Abstract

Co-Sn alloys were prepared by an electrochemical route in molten LiCl-KCl between 400 and 550 °C. The Sn(IV)/Sn(II), Sn(II)/Sn(0) and Co(II)/Co(0) redox couples were studied by cyclic voltammetry and/or chronopotentiometry over the temperature range. The diffusion coefficient values of Co(II) ions were measured. For example, it was found that the D_Co(II) values deduced from chronopotentiometry range from D_Co(II) = 1.65 x 10^-5 cm² s^-1 at 400°C to 4.95 × 10^-5cm² s^-1 at 550°C. The standard potential of the Co(II)/Co(0) redox couple in molten LiCl-KCl was measured at 400°C: E⁰_Co(II)/Co(0) = -1.35 V vs Cl₂/Cl^-. Finally, Co-Sn alloys were prepared in potentiostatic mode. The influence of the temperature of molten LiCl-KCl, the applied potential and the deposition time on the morphology and the composition of the Co-Sn alloys were also investigated. For T > 450°C, the following tendency has been observed: the more negative the potential, the higher the Sn content in the deposited alloy. Thus, depending on the operating conditions, pure CoSn or CoSn₂ can be prepared.

Affiliations:

Links toward previous steps (curation, corpus...)

to stream PascalFrancis, to step Corpus: 000093
to stream PascalFrancis, to step Curation: 000202
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to stream Main, to step Curation: 000631

Le document en format XML

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<keywords scheme="Pascal" xml:lang="fr"><term>Potassium Chlorure</term>
<term>Lithium Chlorure</term>
<term>Réduction chimique</term>
<term>Cobalt alliage</term>
<term>Etain alliage</term>
<term>Sel fondu</term>
<term>Electrolyte fondu</term>
<term>Alliage binaire</term>
<term>Dépôt électrolytique</term>
<term>Cobalt II Composé</term>
<term>Etain II Composé</term>
<term>Effet température</term>
<term>Electrode</term>
<term>Carbone</term>
<term>Etat vitreux</term>
<term>Molybdène</term>
<term>Microscopie électronique balayage</term>
<term>Diffraction RX</term>
<term>Réaction électrochimique</term>
<term>Condition opératoire</term>
<term>Structure surface</term>
<term>Morphologie</term>
</keywords>
<keywords scheme="Wicri" type="topic" xml:lang="fr"><term>Carbone</term>
<term>Molybdène</term>
</keywords>
</textClass>
</profileDesc>
</teiHeader>
<front><div type="abstract" xml:lang="en">Co-Sn alloys were prepared by an electrochemical route in molten LiCl-KCl between 400 and 550 °C. The Sn(IV)/Sn(II), Sn(II)/Sn(0) and Co(II)/Co(0) redox couples were studied by cyclic voltammetry and/or chronopotentiometry over the temperature range. The diffusion coefficient values of Co(II) ions were measured. For example, it was found that the D<sub>Co</sub>
(II) values deduced from chronopotentiometry range from D<sub>Co</sub>
(II) = 1.65 x 10<sup>-5</sup>
 cm<sup>2</sup>
 s<sup>-1</sup>
 at 400°C to 4.95 × 10<sup>-5 </sup>
cm<sup>2</sup>
 s<sup>-1</sup>
 at 550°C. The standard potential of the Co(II)/Co(0) redox couple in molten LiCl-KCl was measured at 400°C: E<sup>0</sup>
<sub>Co(II)/Co(0)</sub>
 = -1.35 V vs Cl<sub>2</sub>
/Cl<sup>-</sup>
. Finally, Co-Sn alloys were prepared in potentiostatic mode. The influence of the temperature of molten LiCl-KCl, the applied potential and the deposition time on the morphology and the composition of the Co-Sn alloys were also investigated. For T > 450°C, the following tendency has been observed: the more negative the potential, the higher the Sn content in the deposited alloy. Thus, depending on the operating conditions, pure CoSn or CoSn<sub>2</sub>
 can be prepared.</div>
</front>
</TEI>
<affiliations><list><country><li>France</li>
<li>Maroc</li>
</country>
<region><li>Île-de-France</li>
</region>
<settlement><li>Paris</li>
</settlement>
</list>
<tree><country name="France"><region name="Île-de-France"><name sortKey="Groult, H" sort="Groult, H" uniqKey="Groult H" first="H." last="Groult">H. Groult</name>
</region>
<name sortKey="Briot, E" sort="Briot, E" uniqKey="Briot E" first="E." last="Briot">E. Briot</name>
<name sortKey="Briot, E" sort="Briot, E" uniqKey="Briot E" first="E." last="Briot">E. Briot</name>
<name sortKey="El Ghallali, H" sort="El Ghallali, H" uniqKey="El Ghallali H" first="H." last="El Ghallali">H. El Ghallali</name>
<name sortKey="Groult, H" sort="Groult, H" uniqKey="Groult H" first="H." last="Groult">H. Groult</name>
<name sortKey="Hernandorena, S" sort="Hernandorena, S" uniqKey="Hernandorena S" first="S." last="Hernandorena">S. Hernandorena</name>
<name sortKey="Hernandorena, S" sort="Hernandorena, S" uniqKey="Hernandorena S" first="S." last="Hernandorena">S. Hernandorena</name>
<name sortKey="Lantelme, F" sort="Lantelme, F" uniqKey="Lantelme F" first="F." last="Lantelme">F. Lantelme</name>
<name sortKey="Lantelme, F" sort="Lantelme, F" uniqKey="Lantelme F" first="F." last="Lantelme">F. Lantelme</name>
<name sortKey="Perrigaud, L" sort="Perrigaud, L" uniqKey="Perrigaud L" first="L." last="Perrigaud">L. Perrigaud</name>
<name sortKey="Perrigaud, L" sort="Perrigaud, L" uniqKey="Perrigaud L" first="L." last="Perrigaud">L. Perrigaud</name>
</country>
<country name="Maroc"><noRegion><name sortKey="El Ghallali, H" sort="El Ghallali, H" uniqKey="El Ghallali H" first="H." last="El Ghallali">H. El Ghallali</name>
</noRegion>
<name sortKey="Barhoun, A" sort="Barhoun, A" uniqKey="Barhoun A" first="A." last="Barhoun">A. Barhoun</name>
</country>
</tree>
</affiliations>
</record>

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	Serveur d'exploration sur le cobalt au Maghreb
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Preparation of Co-Sn alloys by electroreduction of Co(II) and Sn(II) in molten LiCl-KCl

Preparation of Co-Sn alloys by electroreduction of Co(II) and Sn(II) in molten LiCl-KCl

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