электролиз

Mass-transfer processes are considered in a double-chamber running electrolyzer for the synthesis hydroxide of nickel (ІІ) from solution of NiSO₄. The product of Ni(ОН)₂ appears at co-operation of ions of Ni²⁺ the ions of ОН^-, which are generated on a cathode. The mathematical model of processes is formulated. Decisions show dependence of concentrations of ions in a reactionary area from the managed parameters of process and current.

Depolarization of anode by sulfurous anhydride allows to reduce power inputs on hydrogen production in 1.5 times. The reason which prevents commercialization of this process is realization impossibility of industrial electrolysis current density because of SO₂ feeding diffusion limitation to anodic catalytic layer. Pressure influence on water electrolysis process with depolarization anode by sulfurous anhydride in solid polymer electrolyte electrolyzers is examined.

Optimized methods of synthesis and modification of high efficient electrocatalysts for alkaline electrolysers have been described. The results of new electrocatalyst characterization by means of some physico-chemical methods are presented.

We have studied the influence of brighteners used in zinc electroplating on the characteristics of zinc powder, which produced in the manufacture of electrolytic zinc electrode. Their effect was determine on the cathodic process, the nature of spongy zinc deposits, corrosion of the zinc electrode and capacity characteristics with intense discharge in a nickel-zinc accumulator.

Concerning performance, safety, reliability and durability issues, the membrane-electrode assembly (MEA) is probably the weakest cell component. Most performance losses and most accidents occurring during PEM water electrolysis are usually due to the MEA. The purpose of this article is to report on specific degradation mechanisms of the MEA and electrolyser in whole.