Addressed herein, monodisperse platinum nanoparticles (Pt (0)/DPA@GO NPs), supported on graphene oxide (GO), have been prepared by sonochemical double solvent reduction method by the help of dipropylamine (DPA) as a stabilizer at room temperature and used as a catalyst for both C-1 to C-3 alcohol oxidation reaction and the dehydrogenation of dimethylamine-borane ((CH3)(2)NHBH3) at room temperature. Monodisperse Pt (0)/DPA@GO NPs were characterized by atomic force microscopy (AFM), X-ray photoelectron spectroscopy (XPS), X-ray diffraction (XRD), transmission electron microscopy (TEM), ICP-OES, and electrochemical measurements (CV). The catalytic performance of the monodisperse Pt NPs demonstrated that they were highly efficient and reusable catalysts even at low temperature for both methanol, ethanol and 2-propanol oxidations. The prepared nano particles can also catalyse the dehydrogenation of DMAB with very high activity (TOF = 35.82 h(-1)) at room temperature. The prepared monodisperse Pt (0)/DPA@GO NPs have similar to 11.6, 16.8 and 7.61 times higher catalytic activities than the commercially available Pt (ETEK) catalyst towards C-1 to C-3 alcohol oxidation reactions, respectively. The exceptional catalytic activity and stability of highly efficient monodisperse Pt nanoparticles towards agglomeration leaching and CO poisoning allow these particles to be recycled and reused in the catalysis of DMAB dehydrogenation and C-1 to C-3 alcohol oxidation. After fifth subsequent reaction and recovery cycles, the prepared nanocatalyst retained almost >80% activity towards the complete dehydrogenation of DMAB and C-1 to C-3 alcohol oxidation. Copyright (C) 2016, Hydrogen Energy Publications, LLC. Published by Elsevier Ltd. All rights reserved.