Abstract
A step-wise computer model is presented for simultaneous deposition of nickel and nickel hydroxide in aqueous solutions. In acidic solutions ({pH} 1), the potentiostatic current-time transient response on glassy carbon or titanium was analysed with respect to nucleation and radial growth mechanism. pH changes influence the current-time response greatly. A marked maximum in the current transient appears for slightly acidic solutions ({pH} 4.5) and a consecutive decrease in the deposition current density at long times is obtained. This behaviour is attributed to early precipitation of nickel hydroxide due to a local pH increase at the cathode surface.
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Lantelme, F., Seghiouer, A. & Derja, A. Model of nickel electrodeposition from acidic medium. Journal of Applied Electrochemistry 28, 907–913 (1998). https://doi.org/10.1023/A:1003404118601
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DOI: https://doi.org/10.1023/A:1003404118601