Use of CO as probe molecule for characterization of mixed Ru-Ni sulphide phases supported over alumina

J.A. de Los Reyes , M. Vrinat (1) , M. Breysse (1) , F. Mauge , J.C. Lavalley

1 IRC - Institut de recherches sur la catalyse

Infrared spectroscopy was used to characterize mixed ruthenium-nickel sulphides prepared by step-wise impregnation over alumina and further sulphidation. The hydrogenation of biphenyl was compared over samples containing different amounts of nickel and ruthenium and a large increase was observed for a catalyst with an atomic Ni /(Ni + Ru) ratio near 0.4. Infrared spectra of adsorbed CO indicate that the increase in catalytic activity is ascribed to the presence of a very large number of Ru-Ni sites.

Domaines: Catalyse

J.A. de Los Reyes, M. Vrinat, M. Breysse, F. Mauge, J.C. Lavalley. Use of CO as probe molecule for characterization of mixed Ru-Ni sulphide phases supported over alumina. Catalysis Letters, 1992, 13, pp.213-220. ⟨10.1007/BF00770993⟩. ⟨hal-00006236⟩