CobaltMaghrebV1, PascalFrancis, Curation, bibRecord, 000142

Cobalt speciation in cobalt oxide-apatite materials : structure-properties relationship in catalytic oxidative dehydrogenation of ethane and butan-2-ol conversion

Identifieur interne : 000142 ( PascalFrancis/Curation ); précédent : 000141; suivant : 000143

Cobalt 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.

RBID : Pascal:07-0089131

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 Co_xO_y 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.

A01	`01`	`1`		`@0 0959-9428`
A03		`1`		`@0 J. mater. chem.`
A05				`@2 16`
A06				`@2 25`
A08	`01`	`1`	`ENG`	`@1 Cobalt speciation in cobalt oxide-apatite materials : structure-properties relationship in catalytic oxidative dehydrogenation of ethane and butan-2-ol conversion`
A11	`01`	`1`		`@1 KAOUTAR EL KABOUSS`
A11	`02`	`1`		`@1 KACIMI (Mohamed)`
A11	`03`	`1`		`@1 ZIYAD (Mahfoud)`
A11	`04`	`1`		`@1 AMMAR (Souad)`
A11	`05`	`1`		`@1 ENSUQUE (Alain)`
A11	`06`	`1`		`@1 PIQUEMAL (Jean-Yves)`
A11	`07`	`1`		`@1 BOZON-VERDURAZ (Francois)`
A14	`01`			`@1 Laboratoire de Physico-Chimie des Matériaux et Catalyse, Faculté des Sciences, Département de Chimie @2 Rabat @3 MAR @Z 1 aut. @Z 2 aut. @Z 3 aut.`
A14	`02`			`@1 Groupe de Chimie des Matériaux Divisés et Catalyse, ITODYS, UMR-CNRS 7086, Université Paris 7-Denis Diderot, case 7090, 2, place Jussieu @2 75251 Paris @3 FRA @Z 1 aut. @Z 4 aut. @Z 5 aut. @Z 6 aut. @Z 7 aut.`
A20				`@1 2453-2463`
A21				`@1 2006`
A23	`01`			`@0 ENG`
A43	`01`			`@1 INIST @2 22603 @5 354000139008820080`
A44				`@0 0000 @1 © 2007 INIST-CNRS. All rights reserved.`
A45				`@0 54 ref.`
A47	`01`	`1`		`@0 07-0089131`
A60				`@1 P`
A61				`@0 A`
A64	`01`	`1`		`@0 Journal of material chemistry`
A66	`01`			`@0 GBR`
C01	`01`		`ENG`	@0 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 Co_xO_y 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.
C02	`01`	`3`		`@0 001B80A07B`
C02	`02`	`3`		`@0 001B70E30C`
C03	`01`	`3`	`FRE`	`@0 Cobalt oxyde @2 NK @5 01`
C03	`01`	`3`	`ENG`	`@0 Cobalt oxides @2 NK @5 01`
C03	`02`	`3`	`FRE`	`@0 Etude expérimentale @5 02`
C03	`02`	`3`	`ENG`	`@0 Experimental study @5 02`
C03	`03`	`X`	`FRE`	`@0 Relation structure propriété @5 03`
C03	`03`	`X`	`ENG`	`@0 Property structure relationship @5 03`
C03	`03`	`X`	`SPA`	`@0 Relación estructura propiedad @5 03`
C03	`04`	`3`	`FRE`	`@0 Calcium @2 NC @5 04`
C03	`04`	`3`	`ENG`	`@0 Calcium @2 NC @5 04`
C03	`05`	`X`	`FRE`	`@0 Apatite hydroxylée @5 05`
C03	`05`	`X`	`ENG`	`@0 Hydroxyapatite @5 05`
C03	`05`	`X`	`SPA`	`@0 Hidroxiapatito @5 05`
C03	`06`	`X`	`FRE`	`@0 Spectre UV visible @5 06`
C03	`06`	`X`	`ENG`	`@0 Ultraviolet visible spectrum @5 06`
C03	`06`	`X`	`SPA`	`@0 Espectro UV visible @5 06`
C03	`07`	`3`	`FRE`	`@0 Analyse chimique @5 07`
C03	`07`	`3`	`ENG`	`@0 Chemical analysis @5 07`
C03	`08`	`X`	`FRE`	`@0 Spectre IR proche @5 08`
C03	`08`	`X`	`ENG`	`@0 Near infrared spectrum @5 08`
C03	`08`	`X`	`SPA`	`@0 Espectro IR próximo @5 08`
C03	`09`	`3`	`FRE`	`@0 Susceptibilité magnétique @5 09`
C03	`09`	`3`	`ENG`	`@0 Magnetic susceptibility @5 09`
C03	`10`	`3`	`FRE`	`@0 Spectre photoélectron RX @5 10`
C03	`10`	`3`	`ENG`	`@0 X-ray photoelectron spectra @5 10`
C03	`11`	`X`	`FRE`	`@0 Basse température @5 11`
C03	`11`	`X`	`ENG`	`@0 Low temperature @5 11`
C03	`11`	`X`	`SPA`	`@0 Baja temperatura @5 11`
C03	`12`	`X`	`FRE`	`@0 Nanocristal @5 12`
C03	`12`	`X`	`ENG`	`@0 Nanocrystal @5 12`
C03	`12`	`X`	`SPA`	`@0 Nanocristal @5 12`
C03	`13`	`3`	`FRE`	`@0 Nanomatériau @5 13`
C03	`13`	`3`	`ENG`	`@0 Nanostructured materials @5 13`
C03	`14`	`3`	`FRE`	`@0 Diffraction RX @5 14`
C03	`14`	`3`	`ENG`	`@0 XRD @5 14`
C03	`15`	`3`	`FRE`	`@0 Catalyse @5 15`
C03	`15`	`3`	`ENG`	`@0 Catalysis @5 15`
C03	`16`	`3`	`FRE`	`@0 Performance @5 17`
C03	`16`	`3`	`ENG`	`@0 Performance @5 17`
C03	`17`	`3`	`FRE`	`@0 Energie activation @5 18`
C03	`17`	`3`	`ENG`	`@0 Activation energy @5 18`
C03	`18`	`3`	`FRE`	`@0 Ca10(PO4)6(OH)2 @4 INC @5 46`
C03	`19`	`3`	`FRE`	`@0 Ca H O P @4 INC @5 47`
C03	`20`	`3`	`FRE`	`@0 7530C @4 INC @5 71`
C07	`01`	`3`	`FRE`	`@0 Composé minéral @5 26`
C07	`01`	`3`	`ENG`	`@0 Inorganic compounds @5 26`
N21				`@1 057`

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Le document en format XML

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<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>
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<seriesStmt><title level="j" type="main">Journal of material chemistry</title>
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<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>
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<keywords scheme="Wicri" type="topic" xml:lang="fr"><term>Calcium</term>
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<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>
</record>

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	Serveur d'exploration sur le cobalt au Maghreb
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Cobalt speciation in cobalt oxide-apatite materials : structure-properties relationship in catalytic oxidative dehydrogenation of ethane and butan-2-ol conversion

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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