Structural and Catalytic Characterization of Radiation-Induced Ni/TiO2 Nanoparticles
Identifieur interne : 000182 ( Main/Exploration ); précédent : 000181; suivant : 000183Structural and Catalytic Characterization of Radiation-Induced Ni/TiO2 Nanoparticles
Auteurs : S. Chettibi [Algérie] ; N. Keghouche [Algérie] ; Y. Benguedouar [Algérie] ; M. M. Bettahar [France] ; J. Belloni [France]Source :
- Catalysis letters [ 1011-372X ] ; 2013.
Descripteurs français
- Pascal (Inist)
- Wicri :
- topic : Nickel.
English descriptors
- KwdEn :
Abstract
The radiolysis route is applied to synthesize nickel catalysts deposited on titanium dioxide. The TPR profile of radiation-induced Ni/TiO2 catalyst indicates a more complete reduction of the irradiated catalysts compared to the conventionally H2-reduced one. When tested in the benzene hydrogenation, the radiolytic Ni/TiO2 exhibits catalytic properties with higher efficiency than the H2-reduced catalyst. This observation is assigned to the presence of intermetallic Ni-Ti compounds (Ni2.66Ti1.33 and Ni3Ti) evidenced by XRD. In contrast, the calcined and H2-reduced catalyst contains predominantly the oxidized Ni5TiO7 phase, where the nickel is in strong interaction with the support. The TEM observations show highly dispersed nickel.
Affiliations:
- Algérie, France
- Grand Est, Lorraine (région), Île-de-France
- Nancy, Orsay
- Université Henri Poincaré, Université Paris-Sud
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Le document en format XML
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Benguedouar</name><affiliation wicri:level="1"><inist:fA14 i1="01"><s1>Laboratoire Microstructure et Défauts dans les Matériaux, Université Constantine 1, Route de Ain El Bey</s1><s2>25000 Constantine</s2><s3>DZA</s3><sZ>1 aut.</sZ><sZ>2 aut.</sZ><sZ>3 aut.</sZ></inist:fA14><country>Algérie</country><wicri:noRegion>25000 Constantine</wicri:noRegion></affiliation></author><author><name sortKey="Bettahar, M M" sort="Bettahar, M M" uniqKey="Bettahar M" first="M. M." last="Bettahar">M. M. 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The TPR profile of radiation-induced Ni/TiO<sub>2</sub> catalyst indicates a more complete reduction of the irradiated catalysts compared to the conventionally H<sub>2</sub>-reduced one. When tested in the benzene hydrogenation, the radiolytic Ni/TiO<sub>2</sub> exhibits catalytic properties with higher efficiency than the H<sub>2</sub>-reduced catalyst. This observation is assigned to the presence of intermetallic Ni-Ti compounds (Ni<sub>2.66</sub>Ti<sub>1.33</sub> and Ni<sub>3</sub>Ti) evidenced by XRD. In contrast, the calcined and H<sub>2</sub>-reduced catalyst contains predominantly the oxidized Ni<sub>5</sub>TiO<sub>7</sub> phase, where the nickel is in strong interaction with the support. The TEM observations show highly dispersed nickel.</div></front></TEI><affiliations><list><country><li>Algérie</li><li>France</li></country><region><li>Grand Est</li><li>Lorraine (région)</li><li>Île-de-France</li></region><settlement><li>Nancy</li><li>Orsay</li></settlement><orgName><li>Université Henri Poincaré</li><li>Université Paris-Sud</li></orgName></list><tree><country name="Algérie"><noRegion><name sortKey="Chettibi, S" sort="Chettibi, S" uniqKey="Chettibi S" first="S." last="Chettibi">S. Chettibi</name></noRegion><name sortKey="Benguedouar, Y" sort="Benguedouar, Y" uniqKey="Benguedouar Y" first="Y." last="Benguedouar">Y. Benguedouar</name><name sortKey="Keghouche, N" sort="Keghouche, N" uniqKey="Keghouche N" first="N." last="Keghouche">N. Keghouche</name></country><country name="France"><region name="Grand Est"><name sortKey="Bettahar, M M" sort="Bettahar, M M" uniqKey="Bettahar M" first="M. M." last="Bettahar">M. M. Bettahar</name></region><name sortKey="Belloni, J" sort="Belloni, J" uniqKey="Belloni J" first="J." last="Belloni">J. Belloni</name></country></tree></affiliations></record>Pour manipuler ce document sous Unix (Dilib)
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