Abstract

Platinum Powder Formation at Polarization Indiced by Impulse Alternating Current in the Presence of Quadrivalent Titanium Ions

Author(s): B. E. Myrzabekov, A. B. Bayeshov, N. S. Ivanov, A. K. Bayeshova and M. Zh. Zhurynov

Platinum (IV) ions reduction process was firstly studied at polarization induced by pulsed cathode current in the presence of titanium ions (ІV). It was demonstrated that at the current density variation between 1000 and 6000 A/m2 and sulfuric acid concentration between 50 and 300 g/L, current output is reduced, and with increasing of the platinum concentration (ІV) and temperature of the solution is elevated. It also has been established that with increasing of the cathode current, the mean particle size is decreased and achieves 20 nm. It was demonstrated, that in the presence of the titanium (ІV)-titanium (ІІІ) oxidation-reduction system, the platinum powder dispersion is increased.