NDLI: Structural and Catalytic Characterization of Radiation-Induced Ni/TiO2 Nanoparticles

Content Provider	Springer Nature Link
Author	Chettibi, S. Keghouche, N. Benguedouar, Y. Bettahar, M. M. Belloni, J.
Copyright Year	2013
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.When tested in the benzene hydrogenation reaction, the catalyst Ni/TiO2 prepared by gamma-irradiation exhibits catalytic properties (the turn-over frequency at total conversion is 33.5 molecules Bz Ni at −1 s−1 at 140 °C) with higher efficiency and at lower temperature than the H2-reduced catalyst. This observation is assigned to extremely dispersed nickel nanoparticles and to intermetallic Ni2.66Ti1.33 and Ni3Ti compounds evidenced by XRD.
Starting Page	1166
Ending Page	1174
Page Count	9
File Format	PDF
ISSN	1011372X
Journal	Catalysis Letters
Volume Number	143
Issue Number	11
e-ISSN	1572879X
Language	English
Publisher	Springer US
Publisher Date	2013-07-02
Publisher Place	New York
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Nanoparticles Interfacial phases Nickel Titania Radiolytic process Hydrogenation Catalysis Industrial Chemistry/Chemical Engineering Organometallic Chemistry Physical Chemistry
Content Type	Text
Resource Type	Article
Subject	Chemistry Catalysis

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