Cobalt speciation in cobalt oxide-apatite materials : structure-properties relationship in catalytic oxidative dehydrogenation of ethane and butan-2-ol conversion
Identifieur interne : 000173 ( PascalFrancis/Checkpoint ); précédent : 000172; suivant : 000174Cobalt speciation in cobalt oxide-apatite materials : structure-properties relationship in catalytic oxidative dehydrogenation of ethane and butan-2-ol conversion
Auteurs : KAOUTAR EL KABOUSS [Maroc, France] ; Mohamed Kacimi [Maroc] ; Mahfoud Ziyad [Maroc] ; Souad Ammar [France] ; Alain Ensuque [France] ; Jean-Yves Piquemal [France] ; Francois Bozon-Verduraz [France]Source :
- Journal of material chemistry [ 0959-9428 ] ; 2006.
Descripteurs français
- Pascal (Inist)
- Cobalt oxyde, Etude expérimentale, Relation structure propriété, Calcium, Apatite hydroxylée, Spectre UV visible, Analyse chimique, Spectre IR proche, Susceptibilité magnétique, Spectre photoélectron RX, Basse température, Nanocristal, Nanomatériau, Diffraction RX, Catalyse, Performance, Energie activation, Ca10(PO4)6(OH)2, Ca H O P, 7530C.
- Wicri :
- topic : Calcium.
English descriptors
- KwdEn :
- Activation energy, Calcium, Catalysis, Chemical analysis, Cobalt oxides, Experimental study, Hydroxyapatite, Low temperature, Magnetic susceptibility, Nanocrystal, Nanostructured materials, Near infrared spectrum, Performance, Property structure relationship, Ultraviolet visible spectrum, X-ray photoelectron spectra, XRD.
Abstract
Impregnation of calcium hydroxyapatite by a solution of Co(II) nitrate followed by calcination at 823 K gives rise to various species, depending on the cobalt content. At low cobalt content (0.2 wt%), the cobalt species are isolated six-coordinated Co2+ ions. For Co content >0.4 wt%, the presence of tetrahedral Co2+ and octahedral Co3+ species is attested by UV-visible-NIR spectroscopy, magnetic measurements and XPS data. Magnetic data at low temperature suggest the formation of clustered CoxOy entities. For Co content ≥1.7 wt%, Co3O4 nanocrystals are generated, as evidenced by XRD and magnetic measurements. In the presence of oxygen, the butan-2-ol conversion produces only butan-2-one. The most active catalysts are the cobalt poorest samples which contain only isolated Co2+ ions. Oxidative dehydrogenation of ethane gives a similar trend. Upon increasing the cobalt loading above 0.9 wt%, the specific dehydrogenation activity of Co2+ ions decreases because the nature of the sites changes and the basic properties are lowered. Relationships between the nature of the sites and the catalytic performances are proposed.
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de Physico-Chimie des Matériaux et Catalyse, Faculté des Sciences, Département de Chimie</s1><s2>Rabat</s2><s3>MAR</s3><sZ>1 aut.</sZ><sZ>2 aut.</sZ><sZ>3 aut.</sZ></inist:fA14><country>Maroc</country><placeName><settlement type="city">Rabat</settlement><region nuts="2">Rabat-Salé-Kénitra</region></placeName></affiliation></author><author><name sortKey="Ammar, Souad" sort="Ammar, Souad" uniqKey="Ammar S" first="Souad" last="Ammar">Souad Ammar</name><affiliation wicri:level="3"><inist:fA14 i1="02"><s1>Groupe de Chimie des Matériaux Divisés et Catalyse, ITODYS, UMR-CNRS 7086, Université Paris 7-Denis Diderot, case 7090, 2, place Jussieu</s1><s2>75251 Paris</s2><s3>FRA</s3><sZ>1 aut.</sZ><sZ>4 aut.</sZ><sZ>5 aut.</sZ><sZ>6 aut.</sZ><sZ>7 aut.</sZ></inist:fA14><country>France</country><placeName><region type="region" nuts="2">Île-de-France</region><settlement type="city">Paris</settlement></placeName></affiliation></author><author><name sortKey="Ensuque, Alain" sort="Ensuque, Alain" 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aut.</sZ></inist:fA14><country>Maroc</country><placeName><settlement type="city">Rabat</settlement><region nuts="2">Rabat-Salé-Kénitra</region></placeName></affiliation><affiliation wicri:level="3"><inist:fA14 i1="02"><s1>Groupe de Chimie des Matériaux Divisés et Catalyse, ITODYS, UMR-CNRS 7086, Université Paris 7-Denis Diderot, case 7090, 2, place Jussieu</s1><s2>75251 Paris</s2><s3>FRA</s3><sZ>1 aut.</sZ><sZ>4 aut.</sZ><sZ>5 aut.</sZ><sZ>6 aut.</sZ><sZ>7 aut.</sZ></inist:fA14><country>France</country><placeName><region type="region" nuts="2">Île-de-France</region><settlement type="city">Paris</settlement></placeName></affiliation></author><author><name sortKey="Kacimi, Mohamed" sort="Kacimi, Mohamed" uniqKey="Kacimi M" first="Mohamed" last="Kacimi">Mohamed Kacimi</name><affiliation wicri:level="3"><inist:fA14 i1="01"><s1>Laboratoire de Physico-Chimie des Matériaux et Catalyse, Faculté des Sciences, Département de Chimie</s1><s2>Rabat</s2><s3>MAR</s3><sZ>1 aut.</sZ><sZ>2 aut.</sZ><sZ>3 aut.</sZ></inist:fA14><country>Maroc</country><placeName><settlement type="city">Rabat</settlement><region nuts="2">Rabat-Salé-Kénitra</region></placeName></affiliation></author><author><name sortKey="Ziyad, Mahfoud" sort="Ziyad, Mahfoud" uniqKey="Ziyad M" first="Mahfoud" last="Ziyad">Mahfoud Ziyad</name><affiliation wicri:level="3"><inist:fA14 i1="01"><s1>Laboratoire de Physico-Chimie des Matériaux et Catalyse, Faculté des Sciences, Département de Chimie</s1><s2>Rabat</s2><s3>MAR</s3><sZ>1 aut.</sZ><sZ>2 aut.</sZ><sZ>3 aut.</sZ></inist:fA14><country>Maroc</country><placeName><settlement type="city">Rabat</settlement><region nuts="2">Rabat-Salé-Kénitra</region></placeName></affiliation></author><author><name sortKey="Ammar, Souad" sort="Ammar, Souad" uniqKey="Ammar S" first="Souad" last="Ammar">Souad Ammar</name><affiliation wicri:level="3"><inist:fA14 i1="02"><s1>Groupe de Chimie des Matériaux Divisés et Catalyse, ITODYS, UMR-CNRS 7086, Université Paris 7-Denis Diderot, case 7090, 2, place Jussieu</s1><s2>75251 Paris</s2><s3>FRA</s3><sZ>1 aut.</sZ><sZ>4 aut.</sZ><sZ>5 aut.</sZ><sZ>6 aut.</sZ><sZ>7 aut.</sZ></inist:fA14><country>France</country><placeName><region type="region" nuts="2">Île-de-France</region><settlement type="city">Paris</settlement></placeName></affiliation></author><author><name sortKey="Ensuque, Alain" sort="Ensuque, Alain" uniqKey="Ensuque A" first="Alain" last="Ensuque">Alain Ensuque</name><affiliation wicri:level="3"><inist:fA14 i1="02"><s1>Groupe de Chimie des Matériaux Divisés et Catalyse, ITODYS, UMR-CNRS 7086, Université Paris 7-Denis Diderot, case 7090, 2, place Jussieu</s1><s2>75251 Paris</s2><s3>FRA</s3><sZ>1 aut.</sZ><sZ>4 aut.</sZ><sZ>5 aut.</sZ><sZ>6 aut.</sZ><sZ>7 aut.</sZ></inist:fA14><country>France</country><placeName><region type="region" nuts="2">Île-de-France</region><settlement type="city">Paris</settlement></placeName></affiliation></author><author><name sortKey="Piquemal, Jean Yves" sort="Piquemal, Jean Yves" uniqKey="Piquemal J" first="Jean-Yves" last="Piquemal">Jean-Yves Piquemal</name><affiliation wicri:level="3"><inist:fA14 i1="02"><s1>Groupe de Chimie des Matériaux Divisés et Catalyse, ITODYS, UMR-CNRS 7086, Université Paris 7-Denis Diderot, case 7090, 2, place Jussieu</s1><s2>75251 Paris</s2><s3>FRA</s3><sZ>1 aut.</sZ><sZ>4 aut.</sZ><sZ>5 aut.</sZ><sZ>6 aut.</sZ><sZ>7 aut.</sZ></inist:fA14><country>France</country><placeName><region type="region" nuts="2">Île-de-France</region><settlement type="city">Paris</settlement></placeName></affiliation></author><author><name sortKey="Bozon Verduraz, Francois" sort="Bozon Verduraz, Francois" uniqKey="Bozon Verduraz F" first="Francois" last="Bozon-Verduraz">Francois Bozon-Verduraz</name><affiliation wicri:level="3"><inist:fA14 i1="02"><s1>Groupe de Chimie des Matériaux Divisés et Catalyse, ITODYS, UMR-CNRS 7086, Université Paris 7-Denis Diderot, case 7090, 2, place Jussieu</s1><s2>75251 Paris</s2><s3>FRA</s3><sZ>1 aut.</sZ><sZ>4 aut.</sZ><sZ>5 aut.</sZ><sZ>6 aut.</sZ><sZ>7 aut.</sZ></inist:fA14><country>France</country><placeName><region type="region" nuts="2">Île-de-France</region><settlement type="city">Paris</settlement></placeName></affiliation></author></analytic><series><title level="j" type="main">Journal of material chemistry</title><title level="j" type="abbreviated">J. mater. chem.</title><idno type="ISSN">0959-9428</idno><imprint><date when="2006">2006</date></imprint></series></biblStruct></sourceDesc><seriesStmt><title level="j" type="main">Journal of material chemistry</title><title level="j" type="abbreviated">J. mater. chem.</title><idno type="ISSN">0959-9428</idno></seriesStmt></fileDesc><profileDesc><textClass><keywords scheme="KwdEn" xml:lang="en"><term>Activation energy</term><term>Calcium</term><term>Catalysis</term><term>Chemical analysis</term><term>Cobalt oxides</term><term>Experimental study</term><term>Hydroxyapatite</term><term>Low temperature</term><term>Magnetic susceptibility</term><term>Nanocrystal</term><term>Nanostructured materials</term><term>Near infrared spectrum</term><term>Performance</term><term>Property structure relationship</term><term>Ultraviolet visible spectrum</term><term>X-ray photoelectron spectra</term><term>XRD</term></keywords><keywords scheme="Pascal" xml:lang="fr"><term>Cobalt oxyde</term><term>Etude expérimentale</term><term>Relation structure propriété</term><term>Calcium</term><term>Apatite hydroxylée</term><term>Spectre UV visible</term><term>Analyse chimique</term><term>Spectre IR proche</term><term>Susceptibilité magnétique</term><term>Spectre photoélectron RX</term><term>Basse température</term><term>Nanocristal</term><term>Nanomatériau</term><term>Diffraction RX</term><term>Catalyse</term><term>Performance</term><term>Energie activation</term><term>Ca10(PO4)6(OH)2</term><term>Ca H O P</term><term>7530C</term></keywords><keywords scheme="Wicri" type="topic" xml:lang="fr"><term>Calcium</term></keywords></textClass></profileDesc></teiHeader><front><div type="abstract" xml:lang="en">Impregnation of calcium hydroxyapatite by a solution of Co(II) nitrate followed by calcination at 823 K gives rise to various species, depending on the cobalt content. At low cobalt content (0.2 wt%), the cobalt species are isolated six-coordinated Co<sup>2+</sup> ions. For Co content >0.4 wt%, the presence of tetrahedral Co<sup>2+</sup> and octahedral Co<sup>3+</sup> species is attested by UV-visible-NIR spectroscopy, magnetic measurements and XPS data. Magnetic data at low temperature suggest the formation of clustered Co<sub>x</sub>O<sub>y</sub> entities. For Co content ≥1.7 wt%, Co<sub>3</sub>O<sub>4</sub> nanocrystals are generated, as evidenced by XRD and magnetic measurements. In the presence of oxygen, the butan-2-ol conversion produces only butan-2-one. The most active catalysts are the cobalt poorest samples which contain only isolated Co<sup>2+</sup> ions. Oxidative dehydrogenation of ethane gives a similar trend. Upon increasing the cobalt loading above 0.9 wt%, the specific dehydrogenation activity of Co<sup>2+</sup> ions decreases because the nature of the sites changes and the basic properties are lowered. Relationships between the nature of the sites and the catalytic performances are proposed.</div></front></TEI><inist><standard h6="B"><pA><fA01 i1="01" i2="1"><s0>0959-9428</s0></fA01><fA03 i2="1"><s0>J. mater. chem.</s0></fA03><fA05><s2>16</s2></fA05><fA06><s2>25</s2></fA06><fA08 i1="01" i2="1" l="ENG"><s1>Cobalt speciation in cobalt oxide-apatite materials : structure-properties relationship in catalytic oxidative dehydrogenation of ethane and butan-2-ol conversion</s1></fA08><fA11 i1="01" i2="1"><s1>KAOUTAR EL KABOUSS</s1></fA11><fA11 i1="02" i2="1"><s1>KACIMI (Mohamed)</s1></fA11><fA11 i1="03" i2="1"><s1>ZIYAD (Mahfoud)</s1></fA11><fA11 i1="04" i2="1"><s1>AMMAR (Souad)</s1></fA11><fA11 i1="05" i2="1"><s1>ENSUQUE (Alain)</s1></fA11><fA11 i1="06" i2="1"><s1>PIQUEMAL (Jean-Yves)</s1></fA11><fA11 i1="07" i2="1"><s1>BOZON-VERDURAZ (Francois)</s1></fA11><fA14 i1="01"><s1>Laboratoire de Physico-Chimie des Matériaux et Catalyse, Faculté des Sciences, Département de Chimie</s1><s2>Rabat</s2><s3>MAR</s3><sZ>1 aut.</sZ><sZ>2 aut.</sZ><sZ>3 aut.</sZ></fA14><fA14 i1="02"><s1>Groupe de Chimie des Matériaux Divisés et Catalyse, ITODYS, UMR-CNRS 7086, Université Paris 7-Denis Diderot, case 7090, 2, place Jussieu</s1><s2>75251 Paris</s2><s3>FRA</s3><sZ>1 aut.</sZ><sZ>4 aut.</sZ><sZ>5 aut.</sZ><sZ>6 aut.</sZ><sZ>7 aut.</sZ></fA14><fA20><s1>2453-2463</s1></fA20><fA21><s1>2006</s1></fA21><fA23 i1="01"><s0>ENG</s0></fA23><fA43 i1="01"><s1>INIST</s1><s2>22603</s2><s5>354000139008820080</s5></fA43><fA44><s0>0000</s0><s1>© 2007 INIST-CNRS. All rights reserved.</s1></fA44><fA45><s0>54 ref.</s0></fA45><fA47 i1="01" i2="1"><s0>07-0089131</s0></fA47><fA60><s1>P</s1></fA60><fA61><s0>A</s0></fA61><fA64 i1="01" i2="1"><s0>Journal of material chemistry</s0></fA64><fA66 i1="01"><s0>GBR</s0></fA66><fC01 i1="01" l="ENG"><s0>Impregnation of calcium hydroxyapatite by a solution of Co(II) nitrate followed by calcination at 823 K gives rise to various species, depending on the cobalt content. At low cobalt content (0.2 wt%), the cobalt species are isolated six-coordinated Co<sup>2+</sup> ions. For Co content >0.4 wt%, the presence of tetrahedral Co<sup>2+</sup> and octahedral Co<sup>3+</sup> species is attested by UV-visible-NIR spectroscopy, magnetic measurements and XPS data. Magnetic data at low temperature suggest the formation of clustered Co<sub>x</sub>O<sub>y</sub> entities. For Co content ≥1.7 wt%, Co<sub>3</sub>O<sub>4</sub> nanocrystals are generated, as evidenced by XRD and magnetic measurements. In the presence of oxygen, the butan-2-ol conversion produces only butan-2-one. The most active catalysts are the cobalt poorest samples which contain only isolated Co<sup>2+</sup> ions. Oxidative dehydrogenation of ethane gives a similar trend. Upon increasing the cobalt loading above 0.9 wt%, the specific dehydrogenation activity of Co<sup>2+</sup> ions decreases because the nature of the sites changes and the basic properties are lowered. Relationships between the nature of the sites and the catalytic performances are proposed.</s0></fC01><fC02 i1="01" i2="3"><s0>001B80A07B</s0></fC02><fC02 i1="02" i2="3"><s0>001B70E30C</s0></fC02><fC03 i1="01" i2="3" l="FRE"><s0>Cobalt oxyde</s0><s2>NK</s2><s5>01</s5></fC03><fC03 i1="01" i2="3" l="ENG"><s0>Cobalt oxides</s0><s2>NK</s2><s5>01</s5></fC03><fC03 i1="02" i2="3" l="FRE"><s0>Etude expérimentale</s0><s5>02</s5></fC03><fC03 i1="02" i2="3" l="ENG"><s0>Experimental study</s0><s5>02</s5></fC03><fC03 i1="03" i2="X" l="FRE"><s0>Relation structure propriété</s0><s5>03</s5></fC03><fC03 i1="03" i2="X" l="ENG"><s0>Property structure relationship</s0><s5>03</s5></fC03><fC03 i1="03" i2="X" l="SPA"><s0>Relación estructura propiedad</s0><s5>03</s5></fC03><fC03 i1="04" i2="3" l="FRE"><s0>Calcium</s0><s2>NC</s2><s5>04</s5></fC03><fC03 i1="04" i2="3" l="ENG"><s0>Calcium</s0><s2>NC</s2><s5>04</s5></fC03><fC03 i1="05" i2="X" l="FRE"><s0>Apatite hydroxylée</s0><s5>05</s5></fC03><fC03 i1="05" i2="X" l="ENG"><s0>Hydroxyapatite</s0><s5>05</s5></fC03><fC03 i1="05" i2="X" l="SPA"><s0>Hidroxiapatito</s0><s5>05</s5></fC03><fC03 i1="06" i2="X" l="FRE"><s0>Spectre UV visible</s0><s5>06</s5></fC03><fC03 i1="06" i2="X" l="ENG"><s0>Ultraviolet visible spectrum</s0><s5>06</s5></fC03><fC03 i1="06" i2="X" l="SPA"><s0>Espectro UV visible</s0><s5>06</s5></fC03><fC03 i1="07" i2="3" l="FRE"><s0>Analyse chimique</s0><s5>07</s5></fC03><fC03 i1="07" i2="3" l="ENG"><s0>Chemical analysis</s0><s5>07</s5></fC03><fC03 i1="08" i2="X" l="FRE"><s0>Spectre IR proche</s0><s5>08</s5></fC03><fC03 i1="08" i2="X" l="ENG"><s0>Near infrared spectrum</s0><s5>08</s5></fC03><fC03 i1="08" i2="X" l="SPA"><s0>Espectro IR próximo</s0><s5>08</s5></fC03><fC03 i1="09" i2="3" l="FRE"><s0>Susceptibilité magnétique</s0><s5>09</s5></fC03><fC03 i1="09" i2="3" l="ENG"><s0>Magnetic susceptibility</s0><s5>09</s5></fC03><fC03 i1="10" i2="3" l="FRE"><s0>Spectre photoélectron RX</s0><s5>10</s5></fC03><fC03 i1="10" i2="3" l="ENG"><s0>X-ray photoelectron spectra</s0><s5>10</s5></fC03><fC03 i1="11" i2="X" l="FRE"><s0>Basse température</s0><s5>11</s5></fC03><fC03 i1="11" i2="X" l="ENG"><s0>Low temperature</s0><s5>11</s5></fC03><fC03 i1="11" i2="X" l="SPA"><s0>Baja temperatura</s0><s5>11</s5></fC03><fC03 i1="12" i2="X" l="FRE"><s0>Nanocristal</s0><s5>12</s5></fC03><fC03 i1="12" i2="X" l="ENG"><s0>Nanocrystal</s0><s5>12</s5></fC03><fC03 i1="12" i2="X" l="SPA"><s0>Nanocristal</s0><s5>12</s5></fC03><fC03 i1="13" i2="3" l="FRE"><s0>Nanomatériau</s0><s5>13</s5></fC03><fC03 i1="13" i2="3" l="ENG"><s0>Nanostructured materials</s0><s5>13</s5></fC03><fC03 i1="14" i2="3" l="FRE"><s0>Diffraction RX</s0><s5>14</s5></fC03><fC03 i1="14" i2="3" l="ENG"><s0>XRD</s0><s5>14</s5></fC03><fC03 i1="15" i2="3" l="FRE"><s0>Catalyse</s0><s5>15</s5></fC03><fC03 i1="15" i2="3" l="ENG"><s0>Catalysis</s0><s5>15</s5></fC03><fC03 i1="16" i2="3" l="FRE"><s0>Performance</s0><s5>17</s5></fC03><fC03 i1="16" i2="3" l="ENG"><s0>Performance</s0><s5>17</s5></fC03><fC03 i1="17" i2="3" l="FRE"><s0>Energie activation</s0><s5>18</s5></fC03><fC03 i1="17" i2="3" l="ENG"><s0>Activation energy</s0><s5>18</s5></fC03><fC03 i1="18" i2="3" l="FRE"><s0>Ca10(PO4)6(OH)2</s0><s4>INC</s4><s5>46</s5></fC03><fC03 i1="19" i2="3" l="FRE"><s0>Ca H O P</s0><s4>INC</s4><s5>47</s5></fC03><fC03 i1="20" i2="3" l="FRE"><s0>7530C</s0><s4>INC</s4><s5>71</s5></fC03><fC07 i1="01" i2="3" l="FRE"><s0>Composé minéral</s0><s5>26</s5></fC07><fC07 i1="01" i2="3" l="ENG"><s0>Inorganic compounds</s0><s5>26</s5></fC07><fN21><s1>057</s1></fN21></pA></standard></inist><affiliations><list><country><li>France</li><li>Maroc</li></country><region><li>Rabat-Salé-Kénitra</li><li>Île-de-France</li></region><settlement><li>Paris</li><li>Rabat</li></settlement></list><tree><country name="Maroc"><region name="Rabat-Salé-Kénitra"><name sortKey="Kaoutar El Kabouss" sort="Kaoutar El Kabouss" uniqKey="Kaoutar El Kabouss" last="Kaoutar El Kabouss">KAOUTAR EL KABOUSS</name></region><name sortKey="Kacimi, Mohamed" sort="Kacimi, Mohamed" uniqKey="Kacimi M" first="Mohamed" last="Kacimi">Mohamed Kacimi</name><name sortKey="Ziyad, Mahfoud" sort="Ziyad, Mahfoud" uniqKey="Ziyad M" first="Mahfoud" last="Ziyad">Mahfoud Ziyad</name></country><country name="France"><region name="Île-de-France"><name sortKey="Kaoutar El Kabouss" sort="Kaoutar El Kabouss" uniqKey="Kaoutar El Kabouss" last="Kaoutar El Kabouss">KAOUTAR EL KABOUSS</name></region><name sortKey="Ammar, Souad" sort="Ammar, Souad" uniqKey="Ammar S" first="Souad" last="Ammar">Souad Ammar</name><name sortKey="Bozon Verduraz, Francois" sort="Bozon Verduraz, Francois" uniqKey="Bozon Verduraz F" first="Francois" last="Bozon-Verduraz">Francois Bozon-Verduraz</name><name sortKey="Ensuque, Alain" sort="Ensuque, Alain" uniqKey="Ensuque A" first="Alain" last="Ensuque">Alain Ensuque</name><name sortKey="Piquemal, Jean Yves" sort="Piquemal, Jean Yves" uniqKey="Piquemal J" first="Jean-Yves" last="Piquemal">Jean-Yves Piquemal</name></country></tree></affiliations></record>Pour manipuler ce document sous Unix (Dilib)
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|texte= Cobalt speciation in cobalt oxide-apatite materials : structure-properties relationship in catalytic oxidative dehydrogenation of ethane and butan-2-ol conversion
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