Electrodeposit copper from alkaline cyanide-free baths containing 5,5′-dimethylhydantoin and citrate as complexing agents

Abstract

Electrochemical methods, including cyclic voltammetry, chronoamperometry, and chronopotentiometry, combined with molecular dynamic simulations are used to study the electrodeposition mechanism.

Cyanide-free electrolyte for Au/Co–Au nano-multilayer electrodeposition utilising 5,5-dimethylhydantoin as a complexing agent

“…H NMR spectra of the gold electroplating electrolytes were employed to reveal that strong coordination bonding of DMH to Au( iii ) was present, and that [Au(DMH) 4 ] was the quantitative complexation structure. 23–26 In this work, a novel cyanide-free electrolyte for Au/Co–Au nano-multilayer electrodeposition was reported. The structure of Au/Co multi-layer coatings was characterised, which provided an experimental basis for the application of the non-cyanide plating solution system in preparing Au–Co overlapped coatings in the signal bath.…”

New in situ description of electrodepositing multiple nucleation processes under galvanostatic stimuli

“…The non-dimensional plots under potentiostatic stimuli have been widely researched and applied in metal electrodepositing nucleation. [17][18][19][20] Many studies used non-dimensional plots to analyse the nucleation process under galvanostatic stimuli, such as Au, 21,22 Ag, 23 Cu, 24 Sn, 25 Zn-Ni 26 and Sn-Co alloy. 27 With the wide use of the SH model, further amendments were introduced for this model.…”

Studies on the enhanced properties of nanocrystalline Zn–Ni coatings from a new alkaline bath due to electrolyte additives

“…However, these baths have a relatively low current efficiency, so preventing commercial use. 5,5 0 -Dimethylhydantoin (DMH) has been successfully used in Au, 17 Ag 18 and Cu 19 electrodeposition and is a promising complexing agent in Zn-Ni alloy deposition owing to the large stability constants of DMH with Zn 2+ and Ni 2+ . 20 According to our previous studies, 6,21 the investigated new alkaline Zn-Ni alloy bath has a high stability and the ageing has little effect on the electrochemical behaviors of the investigated electrolyte.…”