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

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 H-2-reduced one. When tested in the benzene hydrogenation, the radiolytic Ni/TiO2 exhibits catalytic properties with higher efficiency than the H-2-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 H-2-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.
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Submitted on : Wednesday, March 22, 2017 - 4:40:33 PM
Last modification on : Friday, February 26, 2021 - 3:24:02 PM

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S. Chettibi, N. Keghouche, Y. Benguedouar, Mohammed Bettahar, J. Belloni. Structural and Catalytic Characterization of Radiation-Induced Ni/TiO2 Nanoparticles. Catalysis Letters, Springer Verlag, 2013, 143 (11), pp.1166-1174. ⟨10.1007/s10562-013-1045-z⟩. ⟨hal-01494091⟩

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