Solvent effect on synthesis of perovskite-type La1−xCaxCoO3 and their electrochemical properties for oxygen reactions
Identifieur interne : 000A31 ( Istex/Corpus ); précédent : 000A30; suivant : 000A32Solvent effect on synthesis of perovskite-type La1−xCaxCoO3 and their electrochemical properties for oxygen reactions
Auteurs : A. Kahoul ; A. Hammouche ; F. Nâamoune ; P. Chartier ; G. Poillerat ; J. F. KoenigSource :
- Materials Research Bulletin [ 0025-5408 ] ; 2000.
English descriptors
Abstract
The object of the present investigation is to compare some physico-chemical properties of two La1−xCaxCoO3 series (0.0 ≤ x ≤ 0.6), prepared by the sol-gel route using either water or propanol as solvents. The synthesized oxide powders were characterized by X-ray diffraction (XRD), energy-dispersive spectroscopy (EDS), BET, and electrical conductivity measurements. The morphology of the powders was examined using scanning electron microscopy (SEM). The results revealed that the use of propanol led systematically to the formation of homogeneous oxides with a single perovskite-structure phase, larger surface area, and higher conductivity values compared with those prepared using water. Such features, which seem to be directly related to the properties of the solvent of the starting solution, are undoubtedly favorable for a higher electrocatalytic activity of these oxides in oxygen electrode reactions.
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DOI: 10.1016/S0025-5408(00)00395-0
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Hammouche</name><affiliation><mods:affiliation>Laboratoire d’Energétique et d’Electrochimie des Solides, Institut de Chimie Industrielle, Université F.Abbas de Sétif, 19000 Sétif, Algeria</mods:affiliation></affiliation></author><author><name sortKey="Naamoune, F" sort="Naamoune, F" uniqKey="Naamoune F" first="F." last="Nâamoune">F. Nâamoune</name><affiliation><mods:affiliation>Laboratoire d’Energétique et d’Electrochimie des Solides, Institut de Chimie Industrielle, Université F.Abbas de Sétif, 19000 Sétif, Algeria</mods:affiliation></affiliation></author><author><name sortKey="Chartier, P" sort="Chartier, P" uniqKey="Chartier P" first="P." last="Chartier">P. Chartier</name><affiliation><mods:affiliation>Laboratoire d’Electrochimie et de Chimie Physique du Corps Solide, UMR ULP/CNRS 7512, Université Louis Pasteur, 4 rue Blaise Pascal, 67000, Strasbourg, France</mods:affiliation></affiliation></author><author><name sortKey="Poillerat, G" sort="Poillerat, G" uniqKey="Poillerat G" first="G." last="Poillerat">G. Poillerat</name><affiliation><mods:affiliation>Laboratoire d’Electrochimie et de Chimie Physique du Corps Solide, UMR ULP/CNRS 7512, Université Louis Pasteur, 4 rue Blaise Pascal, 67000, Strasbourg, France</mods:affiliation></affiliation></author><author><name sortKey="Koenig, J F" sort="Koenig, J F" uniqKey="Koenig J" first="J. F." last="Koenig">J. F. Koenig</name><affiliation><mods:affiliation>Laboratoire d’Electrochimie et de Chimie Physique du Corps Solide, UMR ULP/CNRS 7512, Université Louis Pasteur, 4 rue Blaise Pascal, 67000, Strasbourg, France</mods:affiliation></affiliation></author></titleStmt><publicationStmt><idno type="wicri:source">ISTEX</idno><idno type="RBID">ISTEX:B7709DA64E311E937F5C8FB296224C69A37CA869</idno><date when="2000" year="2000">2000</date><idno type="doi">10.1016/S0025-5408(00)00395-0</idno><idno type="url">https://api.istex.fr/document/B7709DA64E311E937F5C8FB296224C69A37CA869/fulltext/pdf</idno><idno type="wicri:Area/Istex/Corpus">000A31</idno><idno type="wicri:explorRef" wicri:stream="Istex" wicri:step="Corpus" wicri:corpus="ISTEX">000A31</idno></publicationStmt><sourceDesc><biblStruct><analytic><title level="a" type="main" xml:lang="en">Solvent effect on synthesis of perovskite-type La1−xCaxCoO3 and their electrochemical properties for oxygen reactions</title><author><name sortKey="Kahoul, A" sort="Kahoul, A" uniqKey="Kahoul A" first="A." last="Kahoul">A. Kahoul</name><affiliation><mods:affiliation>Laboratoire d’Energétique et d’Electrochimie des Solides, Institut de Chimie Industrielle, Université F.Abbas de Sétif, 19000 Sétif, Algeria</mods:affiliation></affiliation><affiliation><mods:affiliation>Corresponding author. Fax: +213-585-84-31</mods:affiliation></affiliation><affiliation><mods:affiliation>E-mail: chimie@elhidhab.cerist.dz</mods:affiliation></affiliation></author><author><name sortKey="Hammouche, A" sort="Hammouche, A" uniqKey="Hammouche A" first="A." last="Hammouche">A. Hammouche</name><affiliation><mods:affiliation>Laboratoire d’Energétique et d’Electrochimie des Solides, Institut de Chimie Industrielle, Université F.Abbas de Sétif, 19000 Sétif, Algeria</mods:affiliation></affiliation></author><author><name sortKey="Naamoune, F" sort="Naamoune, F" uniqKey="Naamoune F" first="F." last="Nâamoune">F. Nâamoune</name><affiliation><mods:affiliation>Laboratoire d’Energétique et d’Electrochimie des Solides, Institut de Chimie Industrielle, Université F.Abbas de Sétif, 19000 Sétif, Algeria</mods:affiliation></affiliation></author><author><name sortKey="Chartier, P" sort="Chartier, P" uniqKey="Chartier P" first="P." last="Chartier">P. Chartier</name><affiliation><mods:affiliation>Laboratoire d’Electrochimie et de Chimie Physique du Corps Solide, UMR ULP/CNRS 7512, Université Louis Pasteur, 4 rue Blaise Pascal, 67000, Strasbourg, France</mods:affiliation></affiliation></author><author><name sortKey="Poillerat, G" sort="Poillerat, G" uniqKey="Poillerat G" first="G." last="Poillerat">G. Poillerat</name><affiliation><mods:affiliation>Laboratoire d’Electrochimie et de Chimie Physique du Corps Solide, UMR ULP/CNRS 7512, Université Louis Pasteur, 4 rue Blaise Pascal, 67000, Strasbourg, France</mods:affiliation></affiliation></author><author><name sortKey="Koenig, J F" sort="Koenig, J F" uniqKey="Koenig J" first="J. F." last="Koenig">J. F. Koenig</name><affiliation><mods:affiliation>Laboratoire d’Electrochimie et de Chimie Physique du Corps Solide, UMR ULP/CNRS 7512, Université Louis Pasteur, 4 rue Blaise Pascal, 67000, Strasbourg, France</mods:affiliation></affiliation></author></analytic><monogr></monogr><series><title level="j">Materials Research Bulletin</title><title level="j" type="abbrev">MRB</title><idno type="ISSN">0025-5408</idno><imprint><publisher>ELSEVIER</publisher><date type="published" when="2000">2000</date><biblScope unit="volume">35</biblScope><biblScope unit="issue">12</biblScope><biblScope unit="page" from="1955">1955</biblScope><biblScope unit="page" to="1966">1966</biblScope></imprint><idno type="ISSN">0025-5408</idno></series><idno type="istex">B7709DA64E311E937F5C8FB296224C69A37CA869</idno><idno type="DOI">10.1016/S0025-5408(00)00395-0</idno><idno type="PII">S0025-5408(00)00395-0</idno></biblStruct></sourceDesc><seriesStmt><idno type="ISSN">0025-5408</idno></seriesStmt></fileDesc><profileDesc><textClass><keywords scheme="KwdEn" xml:lang="en"><term>A. Oxides</term><term>B. Sol-gel chemistry</term><term>D. Electrochemical properties</term></keywords></textClass><langUsage><language ident="en">en</language></langUsage></profileDesc></teiHeader><front><div type="abstract" xml:lang="en">The object of the present investigation is to compare some physico-chemical properties of two La1−xCaxCoO3 series (0.0 ≤ x ≤ 0.6), prepared by the sol-gel route using either water or propanol as solvents. The synthesized oxide powders were characterized by X-ray diffraction (XRD), energy-dispersive spectroscopy (EDS), BET, and electrical conductivity measurements. The morphology of the powders was examined using scanning electron microscopy (SEM). The results revealed that the use of propanol led systematically to the formation of homogeneous oxides with a single perovskite-structure phase, larger surface area, and higher conductivity values compared with those prepared using water. Such features, which seem to be directly related to the properties of the solvent of the starting solution, are undoubtedly favorable for a higher electrocatalytic activity of these oxides in oxygen electrode reactions.</div></front></TEI><istex><corpusName>elsevier</corpusName><author><json:item><name>A. Kahoul</name><affiliations><json:string>Laboratoire d’Energétique et d’Electrochimie des Solides, Institut de Chimie Industrielle, Université F.Abbas de Sétif, 19000 Sétif, Algeria</json:string><json:string>Corresponding author. Fax: +213-585-84-31</json:string><json:string>E-mail: chimie@elhidhab.cerist.dz</json:string></affiliations></json:item><json:item><name>A. Hammouche</name><affiliations><json:string>Laboratoire d’Energétique et d’Electrochimie des Solides, Institut de Chimie Industrielle, Université F.Abbas de Sétif, 19000 Sétif, Algeria</json:string></affiliations></json:item><json:item><name>F. Nâamoune</name><affiliations><json:string>Laboratoire d’Energétique et d’Electrochimie des Solides, Institut de Chimie Industrielle, Université F.Abbas de Sétif, 19000 Sétif, Algeria</json:string></affiliations></json:item><json:item><name>P. Chartier</name><affiliations><json:string>Laboratoire d’Electrochimie et de Chimie Physique du Corps Solide, UMR ULP/CNRS 7512, Université Louis Pasteur, 4 rue Blaise Pascal, 67000, Strasbourg, France</json:string></affiliations></json:item><json:item><name>G. Poillerat</name><affiliations><json:string>Laboratoire d’Electrochimie et de Chimie Physique du Corps Solide, UMR ULP/CNRS 7512, Université Louis Pasteur, 4 rue Blaise Pascal, 67000, Strasbourg, France</json:string></affiliations></json:item><json:item><name>J.F. Koenig</name><affiliations><json:string>Laboratoire d’Electrochimie et de Chimie Physique du Corps Solide, UMR ULP/CNRS 7512, Université Louis Pasteur, 4 rue Blaise Pascal, 67000, Strasbourg, France</json:string></affiliations></json:item></author><subject><json:item><lang><json:string>eng</json:string></lang><value>A. Oxides</value></json:item><json:item><lang><json:string>eng</json:string></lang><value>B. Sol-gel chemistry</value></json:item><json:item><lang><json:string>eng</json:string></lang><value>D. Electrochemical properties</value></json:item></subject><language><json:string>eng</json:string></language><originalGenre><json:string>Full-length article</json:string></originalGenre><abstract>The object of the present investigation is to compare some physico-chemical properties of two La1−xCaxCoO3 series (0.0 ≤ x ≤ 0.6), prepared by the sol-gel route using either water or propanol as solvents. The synthesized oxide powders were characterized by X-ray diffraction (XRD), energy-dispersive spectroscopy (EDS), BET, and electrical conductivity measurements. The morphology of the powders was examined using scanning electron microscopy (SEM). The results revealed that the use of propanol led systematically to the formation of homogeneous oxides with a single perovskite-structure phase, larger surface area, and higher conductivity values compared with those prepared using water. Such features, which seem to be directly related to the properties of the solvent of the starting solution, are undoubtedly favorable for a higher electrocatalytic activity of these oxides in oxygen electrode reactions.</abstract><qualityIndicators><score>4.515</score><pdfVersion>1.2</pdfVersion><pdfPageSize>488 x 722 pts</pdfPageSize><refBibsNative>true</refBibsNative><keywordCount>3</keywordCount><abstractCharCount>911</abstractCharCount><pdfWordCount>2955</pdfWordCount><pdfCharCount>17577</pdfCharCount><pdfPageCount>12</pdfPageCount><abstractWordCount>130</abstractWordCount></qualityIndicators><title>Solvent effect on synthesis of perovskite-type La1−xCaxCoO3 and their electrochemical properties for oxygen reactions</title><pii><json:string>S0025-5408(00)00395-0</json:string></pii><genre><json:string>research-article</json:string></genre><host><volume>35</volume><pii><json:string>S0025-5408(00)X0070-0</json:string></pii><pages><last>1966</last><first>1955</first></pages><issn><json:string>0025-5408</json:string></issn><issue>12</issue><genre><json:string>journal</json:string></genre><language><json:string>unknown</json:string></language><title>Materials Research Bulletin</title><publicationDate>2000</publicationDate></host><categories><wos><json:string>MATERIALS SCIENCE</json:string><json:string>MATERIALS SCIENCE, MULTIDISCIPLINARY</json:string></wos></categories><publicationDate>2000</publicationDate><copyrightDate>2000</copyrightDate><doi><json:string>10.1016/S0025-5408(00)00395-0</json:string></doi><id>B7709DA64E311E937F5C8FB296224C69A37CA869</id><score>0.07286269</score><fulltext><json:item><original>true</original><mimetype>application/pdf</mimetype><extension>pdf</extension><uri>https://api.istex.fr/document/B7709DA64E311E937F5C8FB296224C69A37CA869/fulltext/pdf</uri></json:item><json:item><original>false</original><mimetype>application/zip</mimetype><extension>zip</extension><uri>https://api.istex.fr/document/B7709DA64E311E937F5C8FB296224C69A37CA869/fulltext/zip</uri></json:item><istex:fulltextTEI uri="https://api.istex.fr/document/B7709DA64E311E937F5C8FB296224C69A37CA869/fulltext/tei"><teiHeader><fileDesc><titleStmt><title level="a" type="main" xml:lang="en">Solvent effect on synthesis of perovskite-type La1−xCaxCoO3 and their electrochemical properties for oxygen reactions</title></titleStmt><publicationStmt><authority>ISTEX</authority><publisher>ELSEVIER</publisher><availability><p>©2000 Elsevier Science Inc.</p></availability><date>2000</date></publicationStmt><notesStmt><note>Refereed</note><note type="content">Fig. 1: Effect of calcium content on XRD patterns of La1−xCaxCoO3: (a) (W) series, (b) (P) series.</note><note type="content">Fig. 2: Typical EDS spectra of La, Co, Ca, and O elements in LaCoO3 and La0.8Ca0.2CoO3 (P) series.</note><note type="content">Fig. 3: Electrical conductivity dependence on calcium content (x) for La1−xCaxCoO3 oxides.</note><note type="content">Fig. 4: SEMs of La1−xCaxCoO3 powders: (left) (W) series; (right) (P) series.</note><note type="content">Fig. 5: Specific surface area dependence on calcium content (x) for La1−xCaxCoO3 oxides.</note><note type="content">Fig. 6: The i-η polarization curves of oxygen reduction (a) and evolution (b) for (P) series La1−xCaxCoO3 electrodes in 1 M KOH. (Current densities are based on geometric areas.)</note><note type="content">Fig. 7: Electrode performance as a function of x at η = −0.3 and 0.6 V for O2 reduction (○) and evolution (•), respectively, for the La1−xCaxCoO3 (P) series.</note><note type="content">Table 1: Unit-cell dimensions of La1−xCaxCoO3</note></notesStmt><sourceDesc><biblStruct type="inbook"><analytic><title level="a" type="main" xml:lang="en">Solvent effect on synthesis of perovskite-type La1−xCaxCoO3 and their electrochemical properties for oxygen reactions</title><author xml:id="author-1"><persName><forename type="first">A.</forename><surname>Kahoul</surname></persName><email>chimie@elhidhab.cerist.dz</email><affiliation>Laboratoire d’Energétique et d’Electrochimie des Solides, Institut de Chimie Industrielle, Université F.Abbas de Sétif, 19000 Sétif, Algeria</affiliation><affiliation>Corresponding author. Fax: +213-585-84-31</affiliation></author><author xml:id="author-2"><persName><forename type="first">A.</forename><surname>Hammouche</surname></persName><affiliation>Laboratoire d’Energétique et d’Electrochimie des Solides, Institut de Chimie Industrielle, Université F.Abbas de Sétif, 19000 Sétif, Algeria</affiliation></author><author xml:id="author-3"><persName><forename type="first">F.</forename><surname>Nâamoune</surname></persName><affiliation>Laboratoire d’Energétique et d’Electrochimie des Solides, Institut de Chimie Industrielle, Université F.Abbas de Sétif, 19000 Sétif, Algeria</affiliation></author><author xml:id="author-4"><persName><forename type="first">P.</forename><surname>Chartier</surname></persName><affiliation>Laboratoire d’Electrochimie et de Chimie Physique du Corps Solide, UMR ULP/CNRS 7512, Université Louis Pasteur, 4 rue Blaise Pascal, 67000, Strasbourg, France</affiliation></author><author xml:id="author-5"><persName><forename type="first">G.</forename><surname>Poillerat</surname></persName><affiliation>Laboratoire d’Electrochimie et de Chimie Physique du Corps Solide, UMR ULP/CNRS 7512, Université Louis Pasteur, 4 rue Blaise Pascal, 67000, Strasbourg, France</affiliation></author><author xml:id="author-6"><persName><forename type="first">J.F.</forename><surname>Koenig</surname></persName><affiliation>Laboratoire d’Electrochimie et de Chimie Physique du Corps Solide, UMR ULP/CNRS 7512, Université Louis Pasteur, 4 rue Blaise Pascal, 67000, Strasbourg, France</affiliation></author></analytic><monogr><title level="j">Materials Research Bulletin</title><title level="j" type="abbrev">MRB</title><idno type="pISSN">0025-5408</idno><idno type="PII">S0025-5408(00)X0070-0</idno><imprint><publisher>ELSEVIER</publisher><date type="published" when="2000"></date><biblScope unit="volume">35</biblScope><biblScope unit="issue">12</biblScope><biblScope unit="page" from="1955">1955</biblScope><biblScope unit="page" to="1966">1966</biblScope></imprint></monogr><idno type="istex">B7709DA64E311E937F5C8FB296224C69A37CA869</idno><idno type="DOI">10.1016/S0025-5408(00)00395-0</idno><idno type="PII">S0025-5408(00)00395-0</idno></biblStruct></sourceDesc></fileDesc><profileDesc><creation><date>2000</date></creation><langUsage><language ident="en">en</language></langUsage><abstract xml:lang="en"><p>The object of the present investigation is to compare some physico-chemical properties of two La1−xCaxCoO3 series (0.0 ≤ x ≤ 0.6), prepared by the sol-gel route using either water or propanol as solvents. The synthesized oxide powders were characterized by X-ray diffraction (XRD), energy-dispersive spectroscopy (EDS), BET, and electrical conductivity measurements. The morphology of the powders was examined using scanning electron microscopy (SEM). The results revealed that the use of propanol led systematically to the formation of homogeneous oxides with a single perovskite-structure phase, larger surface area, and higher conductivity values compared with those prepared using water. Such features, which seem to be directly related to the properties of the solvent of the starting solution, are undoubtedly favorable for a higher electrocatalytic activity of these oxides in oxygen electrode reactions.</p></abstract><textClass xml:lang="en"><keywords scheme="keyword"><list><head>Keywords</head><item><term>A. Oxides</term></item><item><term>B. Sol-gel chemistry</term></item><item><term>D. Electrochemical properties</term></item></list></keywords></textClass></profileDesc><revisionDesc><change when="2000">Published</change></revisionDesc></teiHeader></istex:fulltextTEI><json:item><original>false</original><mimetype>text/plain</mimetype><extension>txt</extension><uri>https://api.istex.fr/document/B7709DA64E311E937F5C8FB296224C69A37CA869/fulltext/txt</uri></json:item></fulltext><metadata><istex:metadataXml wicri:clean="Elsevier, elements deleted: ce:floats; body; tail"><istex:xmlDeclaration>version="1.0" encoding="utf-8"</istex:xmlDeclaration><istex:docType PUBLIC="-//ES//DTD journal article DTD version 4.5.2//EN//XML" URI="art452.dtd" name="istex:docType"><istex:entity SYSTEM="gr1" NDATA="IMAGE" name="GR1"></istex:entity><istex:entity SYSTEM="gr2" NDATA="IMAGE" name="GR2"></istex:entity><istex:entity SYSTEM="gr3" NDATA="IMAGE" name="GR3"></istex:entity><istex:entity SYSTEM="gr4" NDATA="IMAGE" name="GR4"></istex:entity><istex:entity SYSTEM="gr5" NDATA="IMAGE" name="GR5"></istex:entity><istex:entity SYSTEM="gr6" NDATA="IMAGE" name="GR6"></istex:entity><istex:entity SYSTEM="gr7" NDATA="IMAGE" name="GR7"></istex:entity></istex:docType><istex:document><converted-article version="4.5.2" docsubtype="fla" xml:lang="en"><item-info><jid>MRB</jid><aid>1473</aid><ce:pii>S0025-5408(00)00395-0</ce:pii><ce:doi>10.1016/S0025-5408(00)00395-0</ce:doi><ce:copyright type="full-transfer" year="2000">Elsevier Science Inc.</ce:copyright></item-info><head><ce:title>Solvent effect on synthesis of perovskite-type La<ce:inf>1−x</ce:inf>Ca<ce:inf>x</ce:inf>CoO<ce:inf>3</ce:inf> and their electrochemical properties for oxygen reactions</ce:title><ce:author-group><ce:author><ce:given-name>A.</ce:given-name><ce:surname>Kahoul</ce:surname><ce:cross-ref refid="AFF1"><ce:sup>a</ce:sup></ce:cross-ref><ce:cross-ref refid="CORR1">*</ce:cross-ref><ce:e-address>chimie@elhidhab.cerist.dz</ce:e-address></ce:author><ce:author><ce:given-name>A.</ce:given-name><ce:surname>Hammouche</ce:surname><ce:cross-ref refid="AFF1"><ce:sup>a</ce:sup></ce:cross-ref></ce:author><ce:author><ce:indexed-name>Naamoune</ce:indexed-name><ce:given-name>F.</ce:given-name><ce:surname>Nâamoune</ce:surname><ce:cross-ref refid="AFF1"><ce:sup>a</ce:sup></ce:cross-ref></ce:author><ce:author><ce:given-name>P.</ce:given-name><ce:surname>Chartier</ce:surname><ce:cross-ref refid="AFF2"><ce:sup>b</ce:sup></ce:cross-ref></ce:author><ce:author><ce:given-name>G.</ce:given-name><ce:surname>Poillerat</ce:surname><ce:cross-ref refid="AFF2"><ce:sup>b</ce:sup></ce:cross-ref></ce:author><ce:author><ce:given-name>J.F.</ce:given-name><ce:surname>Koenig</ce:surname><ce:cross-ref refid="AFF2"><ce:sup>b</ce:sup></ce:cross-ref></ce:author><ce:affiliation id="AFF1"><ce:label>a</ce:label><ce:textfn>Laboratoire d’Energétique et d’Electrochimie des Solides, Institut de Chimie Industrielle, Université F.Abbas de Sétif, 19000 Sétif, Algeria</ce:textfn></ce:affiliation><ce:affiliation id="AFF2"><ce:label>b</ce:label><ce:textfn>Laboratoire d’Electrochimie et de Chimie Physique du Corps Solide, UMR ULP/CNRS 7512, Université Louis Pasteur, 4 rue Blaise Pascal, 67000, Strasbourg, France</ce:textfn></ce:affiliation><ce:correspondence id="CORR1"><ce:label>*</ce:label><ce:text>Corresponding author. Fax: +213-585-84-31</ce:text></ce:correspondence></ce:author-group><ce:date-received day="24" month="9" year="1999"></ce:date-received><ce:date-accepted day="10" month="2" year="2000"></ce:date-accepted><ce:miscellaneous>Refereed</ce:miscellaneous><ce:abstract><ce:section-title>Abstract</ce:section-title><ce:abstract-sec><ce:simple-para>The object of the present investigation is to compare some physico-chemical properties of two La<ce:inf>1−x</ce:inf>Ca<ce:inf>x</ce:inf>CoO<ce:inf>3</ce:inf> series (0.0 ≤ x ≤ 0.6), prepared by the sol-gel route using either water or propanol as solvents. The synthesized oxide powders were characterized by X-ray diffraction (XRD), energy-dispersive spectroscopy (EDS), BET, and electrical conductivity measurements. The morphology of the powders was examined using scanning electron microscopy (SEM). The results revealed that the use of propanol led systematically to the formation of homogeneous oxides with a single perovskite-structure phase, larger surface area, and higher conductivity values compared with those prepared using water. Such features, which seem to be directly related to the properties of the solvent of the starting solution, are undoubtedly favorable for a higher electrocatalytic activity of these oxides in oxygen electrode reactions.</ce:simple-para></ce:abstract-sec></ce:abstract><ce:keywords class="keyword"><ce:section-title>Keywords</ce:section-title><ce:keyword><ce:text>A. Oxides</ce:text></ce:keyword><ce:keyword><ce:text>B. Sol-gel chemistry</ce:text></ce:keyword><ce:keyword><ce:text>D. Electrochemical properties</ce:text></ce:keyword></ce:keywords></head></converted-article></istex:document></istex:metadataXml><mods version="3.6"><titleInfo lang="en"><title>Solvent effect on synthesis of perovskite-type La1−xCaxCoO3 and their electrochemical properties for oxygen reactions</title></titleInfo><titleInfo type="alternative" lang="en" contentType="CDATA"><title>Solvent effect on synthesis of perovskite-type La</title></titleInfo><name type="personal"><namePart type="given">A.</namePart><namePart type="family">Kahoul</namePart><affiliation>Laboratoire d’Energétique et d’Electrochimie des Solides, Institut de Chimie Industrielle, Université F.Abbas de Sétif, 19000 Sétif, Algeria</affiliation><affiliation>Corresponding author. Fax: +213-585-84-31</affiliation><affiliation>E-mail: chimie@elhidhab.cerist.dz</affiliation><role><roleTerm type="text">author</roleTerm></role></name><name type="personal"><namePart type="given">A.</namePart><namePart type="family">Hammouche</namePart><affiliation>Laboratoire d’Energétique et d’Electrochimie des Solides, Institut de Chimie Industrielle, Université F.Abbas de Sétif, 19000 Sétif, Algeria</affiliation><role><roleTerm type="text">author</roleTerm></role></name><name type="personal"><namePart type="given">F.</namePart><namePart type="family">Nâamoune</namePart><affiliation>Laboratoire d’Energétique et d’Electrochimie des Solides, Institut de Chimie Industrielle, Université F.Abbas de Sétif, 19000 Sétif, Algeria</affiliation><role><roleTerm type="text">author</roleTerm></role></name><name type="personal"><namePart type="given">P.</namePart><namePart type="family">Chartier</namePart><affiliation>Laboratoire d’Electrochimie et de Chimie Physique du Corps Solide, UMR ULP/CNRS 7512, Université Louis Pasteur, 4 rue Blaise Pascal, 67000, Strasbourg, France</affiliation><role><roleTerm type="text">author</roleTerm></role></name><name type="personal"><namePart type="given">G.</namePart><namePart type="family">Poillerat</namePart><affiliation>Laboratoire d’Electrochimie et de Chimie Physique du Corps Solide, UMR ULP/CNRS 7512, Université Louis Pasteur, 4 rue Blaise Pascal, 67000, Strasbourg, France</affiliation><role><roleTerm type="text">author</roleTerm></role></name><name type="personal"><namePart type="given">J.F.</namePart><namePart type="family">Koenig</namePart><affiliation>Laboratoire d’Electrochimie et de Chimie Physique du Corps Solide, UMR ULP/CNRS 7512, Université Louis Pasteur, 4 rue Blaise Pascal, 67000, Strasbourg, France</affiliation><role><roleTerm type="text">author</roleTerm></role></name><typeOfResource>text</typeOfResource><genre type="research-article" displayLabel="Full-length article"></genre><originInfo><publisher>ELSEVIER</publisher><dateIssued encoding="w3cdtf">2000</dateIssued><copyrightDate encoding="w3cdtf">2000</copyrightDate></originInfo><language><languageTerm type="code" authority="iso639-2b">eng</languageTerm><languageTerm type="code" authority="rfc3066">en</languageTerm></language><physicalDescription><internetMediaType>text/html</internetMediaType></physicalDescription><abstract lang="en">The object of the present investigation is to compare some physico-chemical properties of two La1−xCaxCoO3 series (0.0 ≤ x ≤ 0.6), prepared by the sol-gel route using either water or propanol as solvents. The synthesized oxide powders were characterized by X-ray diffraction (XRD), energy-dispersive spectroscopy (EDS), BET, and electrical conductivity measurements. The morphology of the powders was examined using scanning electron microscopy (SEM). The results revealed that the use of propanol led systematically to the formation of homogeneous oxides with a single perovskite-structure phase, larger surface area, and higher conductivity values compared with those prepared using water. Such features, which seem to be directly related to the properties of the solvent of the starting solution, are undoubtedly favorable for a higher electrocatalytic activity of these oxides in oxygen electrode reactions.</abstract><note>Refereed</note><note type="content">Fig. 1: Effect of calcium content on XRD patterns of La1−xCaxCoO3: (a) (W) series, (b) (P) series.</note><note type="content">Fig. 2: Typical EDS spectra of La, Co, Ca, and O elements in LaCoO3 and La0.8Ca0.2CoO3 (P) series.</note><note type="content">Fig. 3: Electrical conductivity dependence on calcium content (x) for La1−xCaxCoO3 oxides.</note><note type="content">Fig. 4: SEMs of La1−xCaxCoO3 powders: (left) (W) series; (right) (P) series.</note><note type="content">Fig. 5: Specific surface area dependence on calcium content (x) for La1−xCaxCoO3 oxides.</note><note type="content">Fig. 6: The i-η polarization curves of oxygen reduction (a) and evolution (b) for (P) series La1−xCaxCoO3 electrodes in 1 M KOH. (Current densities are based on geometric areas.)</note><note type="content">Fig. 7: Electrode performance as a function of x at η = −0.3 and 0.6 V for O2 reduction (○) and evolution (•), respectively, for the La1−xCaxCoO3 (P) series.</note><note type="content">Table 1: Unit-cell dimensions of La1−xCaxCoO3</note><subject lang="en"><genre>Keywords</genre><topic>A. Oxides</topic><topic>B. Sol-gel chemistry</topic><topic>D. Electrochemical properties</topic></subject><relatedItem type="host"><titleInfo><title>Materials Research Bulletin</title></titleInfo><titleInfo type="abbreviated"><title>MRB</title></titleInfo><genre type="journal">journal</genre><originInfo><dateIssued encoding="w3cdtf">200009</dateIssued></originInfo><identifier type="ISSN">0025-5408</identifier><identifier type="PII">S0025-5408(00)X0070-0</identifier><part><date>200009</date><detail type="volume"><number>35</number><caption>vol.</caption></detail><detail type="issue"><number>12</number><caption>no.</caption></detail><extent unit="issue pages"><start>1897</start><end>2070</end></extent><extent unit="pages"><start>1955</start><end>1966</end></extent></part></relatedItem><identifier type="istex">B7709DA64E311E937F5C8FB296224C69A37CA869</identifier><identifier type="DOI">10.1016/S0025-5408(00)00395-0</identifier><identifier type="PII">S0025-5408(00)00395-0</identifier><accessCondition type="use and reproduction" contentType="copyright">©2000 Elsevier Science Inc.</accessCondition><recordInfo><recordContentSource>ELSEVIER</recordContentSource><recordOrigin>Elsevier Science Inc., ©2000</recordOrigin></recordInfo></mods></metadata><serie></serie></istex></record>Pour manipuler ce document sous Unix (Dilib)
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