Synthesis conditions are keys to control size and dispersion of Platinum (Pt) nanoparticle (NP) structures that are the most important factors in improving the electrochemical activity and durability of electrodes in low temperature fuel cells. In this study, five catalyst samples Pt nanoparticles on carbon support (Pt NPs/C) have been synthesized by the simple and facile method at 30 o C or 60 o C in pH = 6.5 or pH = 11 solution with or without using ethylene glycol (EG). The morphology, size, dispersion and activity of Pt NPs/C were characterized by using Xray diffraction (XRD), Transmission electron microscopy (TEM) and Cyclic Voltammetry (CV) in order to evaluate the effectiveness of this synthesis process. We found that the size, morphology and dispersion of Pt NPs/C were strongly affected by adjusting the temperature, pH and the presence of ethylene glycol. Finally, through determining electrochemically active surface area of a typical catalytic sample, we were able to conclude that the procedure have been established to reach goals simple, inexpensive but still can improve the catalytic activity for methanol oxidation reaction in direct methanol fuel cell (DMFC).

Vietnam was ranked 6th among countries deemed vulnerable to climate change based on

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