Bolotin A. Dynamic properties of the anode-polarized metal - oxide systems

Nonlinear dynamics of processes in electrochemical systems such as Me, MeOx / HA far from of thermodynamic balance. Definition of conditions occurrence dynamic instability in area high of anode potentials, modeling of dynamic behavior of anode process in system Pt, PtOx / H2SO4, and also specification of the mechanism of electrode processes on nickel electrode in sulfate solutions on the basis analysis of transients processes. Method of voltamperometrics with linear and cyclic development of potential, spectrophotometrical methods, mathematical modeling and computing experiment. Stability and dynamic properties of electrochemical system Ni, NiOx / H2SO4 in active - passive area depending on a regime electrolysis are investigated. The method of numerical modeling shows an opportunity of occurrence effect of "long wave" fluctuations in system Pt, PtOx / H2SO4 under certain conditions, for example at inhibition by a final product of electrode surface. For the first time "long wave" of partial current fluctuation of electro oxidation cathions Cr3 + on a platinum electrode are fixed, which explain non-reproducibility of experimental data given in the literature. The way of stabilization of a unstable dynamic regime of oxidation Cr3 + is offered which consists in imposing on potential of a working electrode of a sine wave small amplitude pulsation. The received experimental results and offered mathematical models can be used at management of various technological processes, which are carried out with use of metal - oxide electrodes.