Bimetallic Ru-Cu Nanoparticles Synthesized in Ionic Liquids: Kinetically Controlled Size and Structure

P. P. Arquilliere , I. S. Helgadottir , C. C. Santini , P. H. Haumesser , M. Aouine (1) , L. Massin (2) , J. L. Rousset (3)

1 +MAO
2 +LMA
3 MATERIAUX:SURFACES+JRO

We report a new synthesis of size-controlled bimetallic Ru-Cu nanoparticles (NPs) in ionic liquids using two organometallic precursors. Interestingly enough, upon mixing ruthenium and copper precursors, smaller bimetallic NPs (1.9-2.8 nm) are formed as compared to single metals (Cu: 5 nm; Ru: 4 nm) in a large range of copper molar fractions (chi(Cu) = 0.005-0.91). Surface and microscopy techniques evidence that NPs have metallic copper on the surface and crystalline hexagonal close-packed metallic ruthenium core. This structure is further assessed by the catalytic activity of the bimetallic NPs, showing that conversion of benzene in cyclohexane is reduced with increasing chi(Cu).

Domaines: Catalyse; Environnement et Société

P. P. Arquilliere, I. S. Helgadottir, C. C. Santini, P. H. Haumesser, M. Aouine, et al.. Bimetallic Ru-Cu Nanoparticles Synthesized in Ionic Liquids: Kinetically Controlled Size and Structure. Topics in Catalysis, 2013, 56, pp.1192-1198. ⟨10.1007/s11244-013-0085-3⟩. ⟨hal-00861180⟩