Electrodeposition of lead sulphide

✍ Scribed by Benjamin Scharifker; Zulay Ferreira; Jose Mozota

• Publisher: Elsevier Science
• Year: 1985
• Tongue: English
• Weight: 493 KB
• Volume: 30
• Category: Article
• ISSN: 0013-4686
• DOI: 10.1016/0013-4686(85)80111-0

✦ Synopsis

The electrodeposition of lead sulphide on polycrystalline lead from aqueous sulphide solutions has been investigated. At low deposition potentials, a unit cell of galena oriented on the (110) plane is deposited through a two-dimensional nucleation and growth mechanism Non-linear twc&imensional growth rates have been observed, possibly caused by impedements originated in the grain sfructure of the underlying substrate. High field growth of a thicker lead sulphide film occurs at higher potentials, and dielectric breakdown was observed at fields of ca 4 x lot6 V cm-I, The electrochemical reactions attending the film formation process are discussed on the basis of variations in the voltammetric peak potentials with sulphide concentration and pH.