Electrochemical Synthesis of Iron and Platinum Nanoparticles in Deionized Water

摘要

The processes of formation of disperse phase in water in a two-electrode electrochemical cell with platinum or steel electrodes in the constant electric potential application regime are studied. It is established by the method of dynamic light scattering (DLS) that the charge transfer process in the system is accompanied by formation of nanoparticles (NPs) made of electrode material in the aqueous medium. It is shown that the dynamics of changes in the electric current conforms to the dynamics of NP formation. Simultaneous registration of absorbance spectra of the aqueous medium at various moments of time has shown the presence of plasmon resonance bands corresponding to a platinum NP. In case of platinum electrode, a residue of platinum-containing NPs was found on the cathode using energy-dispersive X-ray microanalysis (EDXMA) and electronic spectroscopy for chemical analysis (ESCA) methods. The possibility of cathophoresis of platinum NPs forming on the anode to the cathode under effect of the applied voltage in the cell with water.