Magnetically recyclable Pt/C(Ni) nanocatalysts with improved selectivity for hydrogenation of o-chloronitrobenzene

Magnetically recyclable Pt/C(Ni) catalysts consisting of Pt nanoparticles on the surface of flower-like C(Ni) nanocomposite was synthesized and tested for the selective hydrogenation of o-chloronitrobenzene to o-chloroaniline at 30 °C and atmospheric pressure. The Pt/C(Ni) catalysts show higher selectivity towards o-chloroaniline than the Pt/C catalyst due to the synergistic effect between Pt and Ni species, which is partly evidenced by the X-ray photoelectron spectroscopy results. Another promising feature of the as-made Pt/C(Ni) catalysts is that they can be easily separated from the reaction system by using an external magnetic field, and this is beneficial for the recycle of noble metal catalysts.

Magnetically recyclable Pt/C(Ni) nanocatalysts with homogeneous dispersion of Pt nanoparticles have been synthesized and tested for the selective hydrogenation of o-chloronitrobenzene to o-chloroaniline, which exhibits much higher o-chloroaniline selectivity than Pt/C due to the electronic effect between Pt and Ni species.Figure optionsDownload as PowerPoint slideHighlights
► Pt/C(Ni) catalyst with high dispersion of Pt nanoparticles has been synthesized.
► Pt/C(Ni) catalyst shows high selectivity due to the synergistic effect of Pt and Ni.
► Pt/C(Ni) catalyst can be magnetically recycled by the usage of a magnetic bar.