NDLI: A composite additive used for a new cyanide-free silver plating bath (II): an insight by electrochemical measurements and quantum chemical calculation

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A composite additive used for a new cyanide-free silver plating bath (II): an insight by electrochemical measurements and quantum chemical calculation

Content Provider	Semantic Scholar
Author	Liu, Anmin Ren, Xuefeng An, Maozhong
Copyright Year	2017
Abstract	The influence of composite additives, 2,2′-bipyridine (BPY) and potassium antimonyl tartrate (PAT), on the electrochemical behavior of a 5,5-dimethylhydantoin (DMH)-based cyanide-free silver plating bath was investigated by experiments and quantum chemical calculations. The cathodic discharge process of the cyanide-free silver plating bath was studied by cyclic voltammetry (CV) and electrochemical impedance spectroscopy (EIS) measurements. CVs with different sweep rates and cathodic polarization measurements performed on a glassy carbon rotating disk electrode (GC-RDE) were employed to investigate the influence of composite additives on kinetic features of the discharge process of electroactive species. Without and with additives, the nucleation processes of silver deposition from these two electrolytes both exhibit three-dimensional progressive nucleation according to the chronoamperometry (I–t) measurements. In order to reveal the relevance between the inhibitive influence of additives and their molecular structures, the electronic properties of BPY and PAT were studied by quantum chemical calculations. The adsorption behaviors of BPY and PAT on the silver surface were further investigated by theoretical calculations and X-ray photoelectron spectroscopy (XPS). The results are in good agreement with each other, which confirms that BPY and PAT are effective additives for DMH based silver plating baths due to their ability to strongly adsorb on silver surfaces.
Starting Page	11104
Ending Page	11112
Page Count	9
File Format	PDF HTM / HTML
DOI	10.1039/C7NJ02638B
Volume Number	41
Alternate Webpage(s)	http://www.rsc.org/suppdata/c7/nj/c7nj02638b/c7nj02638b1.pdf
Alternate Webpage(s)	https://doi.org/10.1039/C7NJ02638B
Language	English
Access Restriction	Open
Content Type	Text
Resource Type	Article

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