Cubical Pd nanoparticles incorporated magnetically recyclable nanoreactor (Pd cNPs/C@Fe3O4) are found to be efficient catalysts for the hydrogenation or aromatic nitrocompounds, Suzuki-Miyaura coupling and the sequential reaction of C-C coupling followed by reduction of nitrobiphenyl substrates. A variety of aryl iodides, bromides and chlorides were coupled with phenylboronic acids to form corresponding biaryl products and variety of nitro aromatic compounds was hydrogenated with excellent yield and high TON. The catalytic activity of palladium cubical nanoparticles (Pd cNPs) embedded with excess of {100} surface facets are superior compared to Pd spherical nanoparticles (Pd sNPs) embedded with mixed surface facets. The catalytic efficiency remains unaltered even after five repeated cycles. The observed enhanced catalytic activity is attributed to the high density of low-coordinated Pd {100} atoms present at the surface of the Pd cNPs/C@Fe3O4 catalyst, confirmed by HR-TEM studies. Also, the catalyst is truly heterogeneous, highly stable, does not require any toxic ligands, has wide substrate scope in both nitroreduction and Suzuki-Miyaura coupling reaction along with the ability to catalyse in a sequential manner, magnetically separable from the reaction mixture and can be reused. (C) 2016 Published by Elsevier B.V.