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Supported Ru-based catalysts,prepared by a surfactant-stabilized colloidal method,exhibited a good selectivity to bis(4-aminocyclohexyl)methane via the hydrogenation of 4,4-methylenedianiline.Transmission electron microscopy(TEM) and X-ray diffraction(XRD) characterization showed Ru nanoparticles were well-dispersed on activated carbon,leading to the high activity and selectivity to the product.