Electrodeposition of Platinum Nanoparticles from Different Supporting Electrolyte Concentration for Ethanol Electrooxidation Application
Amelia Sabella, Annisa Auliya, Setia Budi and An^amt Mohamed Noor

Universitas Negeri Jakarta, The Center for Science Innovation, Universiti Malaysia Kelantan

Abstract

Platinum nanoparticles were successfully synthesized on fluorine doped tin oxide using the square-wave pulse deposition technique at different concentrations of supporting electrolyte. At 0.5 M H2SO4 supporting electrolyte, the nanoparticles form spherical particles surrounded by rough surface. As the concentration of the supporting electrolyte increases, the rough surface grows into fine spines which become thicker and clearer. Ethanol electrooxidation test using cyclic voltammetry showed that Pt0.5M has the highest anodic current compared to other catalysts, which was 3.153 mA/cm2. The high catalytic activity is supported by the low charge transfer resistance value of Pt0.5M in electrochemical impedance spectroscopy measurements. These results indicate that the high catalytic activity of the sample is due to its large number of particles and its shape which has many active sites, so that it can activate reactions in the system.

Keywords: electrodeposition, ethanol electrooxidation, platinum nanoparticles, supporting electrolyte

Topic: Chemistry