Effect of Cl- and SO42- Ions on Electrodeposition of Cobalt from Acidic Gluconate Solutions

被引：0
|
作者：
Rudnik, Ewa [1 ]
Dashbold, Namuun [1 ]
机构：
[1] AGH Univ Sci & Technol, Fac Nonferrous Met, PL-30059 Krakow, Poland
来源：
RUSSIAN JOURNAL OF ELECTROCHEMISTRY | 2019年 / 55卷 / 12期
关键词：
cobalt; electrodeposition; nucleation; voltammetry; GLASSY-CARBON ELECTRODE; NUCLEATION MECHANISMS; CHLORIDE SOLUTIONS; CURRENT EFFICIENCY; THIN-FILMS; PART I; GROWTH; GOLD; CO; DEPOSITION;
D O I：
10.1134/S1023193519120140
中图分类号：
O646 [电化学、电解、磁化学];
学科分类号：
081704 ;
摘要：
A role of anions in potentiostatic electrodeposition of cobalt from acidic gluconate solutions was investigated. Equilibrium distribution of soluble species in the solutions was calculated and compared with absorption spectra. Cyclic voltammetry and potentiostatic measurements confirmed that cathodic process was inhibited mainly by free sulfate ions. Improved buffer capacity of gluconate baths by addition of sulfate ions protected against contamination of metal deposits by products of cobalt salt hydrolysis. Mathematical models of metal nucleation were tested indicating progressive mode responsible for the formation of the metal phase. Diffusion coefficients of cobalt species were also calculated using various approaches. Thickness, morphology and structure of cobalt deposits as well as cathodic current efficiency were also discussed.
引用
收藏
页码：1305 / 1319
页数：15
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