Addressed herein, we reported the fabrication of the graphene oxide (GO) supported monodispersed ruthenium-platinum-nickel (RuPtNi) nanomaterials (3.40 +/- 0.32 nm) to be utilized as a catalyst in the process of dimethylamine borane (DMAB) dehydrogenation. The nanoparticles were fabricated through the ultrasonication method by co-reducing the Ru3+, Pt2+ and Ni2+ cations and then the nanomaterials were characterized by X-ray diffraction (XRD), Raman spectroscopy, transmission electron microscopy (TEM), high resolution transmission electron microscopy (HRTEM), electron energy loss spectroscopy (EELS), inductively coupled plasma optical emission spectrometry (ICP-OES), and X-ray photoelectron spectroscopy (XPS). The fabricated nanomaterials showed outstanding efficiency and remarkable reusability in addition to their record catalytic activity at low temperatures and with extreme low concentrations. They had a significantly high turnover frequency (TOF) (727 h(-1)) and low activation energy (E-a) (49.43 +/- 2 kJ mol(-1)) for DMAB dehydrocoupling. To the best of our knowledge, RuPtNi@GO NPs become a very promising candidate as the best catalyst ever. (C) 2017 Hydrogen Energy Publications LLC. Published by Elsevier Ltd. All rights reserved.