Influence of different types of surfactants on electrodeposition of copper- and carbon-bearing (graphite, carbon nanotubes (CNTs)) composite powder has been experimentally investigated. The size of powder particles decreased, and corrosion resistance increased when surfactants were added. Addition of cationic surfactant CTAB to the electrolyte with simultaneous ultrasonic treatment for CNTs dispersion gives maximum effect.
The article presents the results of studies of electrochemical deposition of silver nanoparticles (AgNPs) on the silicon surface in dimethylformamide solutions of 0.025M; 0.05M; 0.1M (NH4)[Ag(CN)2]. Combination of a pulsed electrolysis mode and an organic aprotic solvent medium (DMF) ensures the formation of 50-150 nm spherical AgNPs with uniform distribution over the silicon surface. It is shown that the main factors influencing the morphology and size of silver nanoparticles are the value of the cathode potential, the concentration of ions [Ag(CN)2]- and the duration of electrolysis.
The electrolytic iron powder with controlled shape and size of particles and required structural, physical and functional properties was synthesized. The electrolytic precipitation of dispersed iron was carried out using a steel soluble anode and a titanium cathode. Sulfate electrolyte was used; the shape of the cathode was a plate; the electrolysis time was 1 h. Experimental studies were carried out using correlation-regression analysis. The average particle size and morphology were determined using optical microscopy.
Composite materials based on PbO2 containing TiO2 or ZrO2 were prepared from electrolytes containing a suspension of TiO2 or ZrO2. The contents of foreign oxides in the composite depend on the electrolyte composition and conditions of deposition. When a dispersed phase is incorporated into the composite coating, the dimensions of lead dioxide crystals decrease to submicro- and nano-size. Physico-chemical properties and electrocatalytic activity of composite materials are mainly determined by their chemical composition.
Influence of bismuth ions on kinetics of lead dioxide electrodeposition from methanesulfonate electrolytes on Pt-electrode was studied. Experimental results are interpreted to be consistent with the mechanism proposed previously for lead dioxide electrodeposition in literature. The presence of bismuth ions in the electrodeposition solution causes decreasing rate constants of lead dioxide formation due to additive adsorption.