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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Catalysis Letters, Springer Verlag, 2013, 143 (11), pp.1166-1174. 〈10.1007/s10562-013-1045-z〉
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Soumis le : mercredi 22 mars 2017 - 16:40:33
Dernière modification le : mercredi 10 octobre 2018 - 16:10:39

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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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