Previous studies in our group showed the efficient synthesis of soluble Pd, Ru, Ir and Rh nanoparticles stabilized by phosphorus ligands using the organometallic approach developed by Chaudret.1 These metal nanoparticles showed interesting activities and selectivity in hydrogenation reactions.2-4 The main disadvantage when dealing with soluble nanoparticles in catalysis, is the difficulty for recycling and reusing. The use of supported catalysts allow to ensure the sustainability of the processes due to benefits offered by the supported nanoparticles catalysts in terms of robustness, recovery, reuse and consequently in terms of environmental and economic costs. In this presentation a new methodology for the stabilization of rhodium and platinum supported nanoparticles will be discussed. This approach consists in the use of a phosphine functionalized support prepared by SOMC ( Surface Organometallic Chemistry) methodology to synthesize in situ the metallic nanoparticles using the organometallic approach. The characterization of the systems show an homogeneous distribution in the support of the metallic nanoparticles with a small size of ca. 1.17 and 1.47 nm for the Pt and Rh respectively. These new systems were active in the hydrogenation of aromatics and ketones. Remarkably, promising results were obtained for the selective hydrogenation of furfural to furfuryl alcohol, using both systems, with high activities in the case of the Pt supported catalysts. The phosphine stabilized moiety could play an important role in this reaction. This new approach to surface organometallic chemistry will contribute to the development of catalytic systems of improved performances compared to the current state-of-the-art.

Rh and Pt nanoparticles stabilized by phosphine functionalized silica for selective hydrogenation reactions

253rd National Meeting (2017)

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