Title :
Influence of surface configurations of adsorbed cyanide ions to anodic dissolution of silver and gold in cyanide electrolytes
Author :
Rogozhnikov, N.A. ; Shevtsova, O.N.
Author_Institution :
NSTU, Novosibirsk
Abstract :
The low coverage adsorption of CN- ions on Ag and Au have been studied by means of density functional theory and cluster model. Geometry and adsorption energy of one- and two-coordination associations of cyanide with surface silver and gold atoms have been computed. It was founded on the base of comparison of surface configuration energies that the part of surface gold atoms on which is adsorbed two CN- ions considerably less than such for atoms of silver. This phenomenon can motive the passivation of gold dissolution in the cyanide electrolytes.
Keywords :
adsorbed layers; adsorption; association; carbon compounds; density functional theory; dissolving; electrolytes; gold; passivation; silver; Ag; Au; CN; adsorption; anodic dissolution; cluster model; cyanide electrolytes; cyanide ions; density functional theory; electrolytes; gold atoms; gold dissolution; one-coordination association; passivation; silver atoms; surface configurations; two-coordination association; Atomic layer deposition; Chemical technology; Chemistry; Computational modeling; Density functional theory; Electrodes; Gold; Polymers; Silver; Surface structures;
Conference_Titel :
Strategic Technologies, 2008. IFOST 2008. Third International Forum on
Conference_Location :
Novosibirsk-Tomsk
Print_ISBN :
978-1-4244-2319-4
Electronic_ISBN :
978-1-4244-2320-0
DOI :
10.1109/IFOST.2008.4602919
