ISSN:
1572-8838
Keywords:
current efficiency
;
electrodeposition
;
fluorosilicic acid
;
mass transfer
;
silver
Source:
Springer Online Journal Archives 1860-2000
Topics:
Chemistry and Pharmacology
,
Electrical Engineering, Measurement and Control Technology
Notes:
Abstract The stripping and electrodeposition of silver in fluorosilicic acid solution are irreversible reactions as indicated by cyclic voltammetry. The rate constant for the intrinsic heterogeneous cathodic deposition of silver was obtained as k C 0 =40.77 exp(1.88−29.43 E C 0′ ) and the diffusion coefficient of the silver ion in fluorosilicic acid solution as 5.17×10−5 cm2 s−1. Theoretical calculations of the concentration of silver ion correlated well with experimental data. The relationship between the diffusion layer thickness and the stirring rate was also obtained. Increasing the stirring rate and temperature, and decreasing the current density and concentration of fluorosilicic acid, caused an increase in the current efficiency for silver deposition on graphite.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1023/A:1003646119602
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