Platinum electrodeposition from a dinitrosulfatoplatinate(II) electrolyte

Abstract

In this work a halogen-free electrolyte to deposit platinum nanoparticle is studied. The investigated [Pt(NO2)2SO4]2−-complex is suitable for electrochemical deposition on halogen sensitive substrates. The mechanism and kinetic of particle deposition is investigated using a glassy carbon rotating disk electrode. Nano sized platinum particles are deposited by using pulse plating technique. The size of the smallest platinum nanoparticle is 5nm. The shape of the particle distribution strictly depends on the plating time. The platinum deposition is usually superimposed with hydrogen evolution. A diffusion coefficient of the [Pt(NO2)2SO4]2‐-complex is determined to 5.4×10−6cm2s−1. The current efficiency depends on the deposition parameters and amounts to 37% under the chosen pulse plating conditions.