Macromolecular Research, Vol.24, No.11, 1024-1029, November, 2016
Preparation and Catalytic Application of Rh3+/Ru3+ Bimetallic Catalyst Stabilized by Triolefinic Macrocycle-Terminated Poly(propylene imine) Dendrimer
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The novel homogeneous bimetallic Rh3+/Ru3+ catalyst (G2-M(Rh3+xRu3+10-x)) was prepared within a second-generation poly(propylene imine) dendrimer terminated by nitrogen-containing triolefinic macrocycle (G2-M) by a co-complexation route. The G2-M(Rh3+x Ru3+10-x) catalyst was analyzed by 1H NMR (nuclear magnetic resonance), XPS (X-ray photoelectron spectroscopy), and XRD (X-ray diffraction). As a novel catalyst system, The bimetallic ions of Rh3+ and Ru3+ influenced on the catalytic activity for the hydrogenation of nitrile-butadiene rubber (NBR), which can be related to electron-deficiency effect resulting from the electron density shift from the Rh3+ to the Ru3+. The G2-M(Rh3+10) and G2-M(Rh3+7 Ru3+3) displayed more excellent activity and favorable separation capability for the hydrogenation of NBR than the Rh nanoparticle catalyst stabilized by G2-M (G2-M(Rh10)).
Keywords:poly(propylene imine) dendrimer;catalytic hydrogenation;bimetallic ions;nitrile-butadiene rubber
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