Abstract
SUMMARYCobalt sulphide coatings formed by two cycles (one cycle includes the treatment of the surface with the solution of Co(II) ammoniate complex; hydrolysis of the adsorbed Co(II) compounds; and sulphidation (in Na2S solution) of the products of the hydrolysis) contain ∼15% CoS, which in 0.1 M KClO4 solution is reduced in the region of potentials of hydrogen evolution, and Co hydroxosulphide. Reduction of the latter occurs at the potentials from -0.4 to -0.8 V in 0.1 M KClO4 solution and in the potential region 0.2-0.3 V in 0.05 M H2SO4, The reduction occurs in the solid phase and is reversible. After treating such a coating with a solution of Cu(II) ions, only CoS interacts with Cu(II), giving, as a result of redox and exchange processes, Cu2–xS.
Sign-in/Register to access full text options 
Free) 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a call
