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Cyclic voltammetric behaviour and some surface characteristics of the lead electrode in aqueous HCl solutions.

Abstract
The positive linear sweep voltammograms of lead were investigated in 0.01-2.00 M aqueous HCl solutions. The results revealed the occurrence of one anodic current peak as the result of formation of a thin PbCl2 surface layer. Intensive study of the electrochemical behaviour of the lead electrode in 1.00 M HCl solution was carried out by cyclic voltammetry. The results indicated that the formation of PbCl2 is a reversible process controlled by diffusion of Cl- ions to the electrode surface. Controlling the voltammetric conditions enabled the building up of a relatively thick and porous PbCl2 layer that could resist rupture or breakdown. In addition, the electrode surface products were examined by scanning electron microscopy and X-ray diffractometry. The morphology of the as-formed PbCl2 layers showed a primitive dependence on the voltammetric conditions. X-ray diffraction analysis proved that only PbCl2 was formed on the electrode surface and no other products could be detected.
AuthorsA M Abd el-Halim, M H Fawzy, A Saty
JournalJournal of chemical technology and biotechnology (Oxford, Oxfordshire : 1986) (J Chem Technol Biotechnol) Vol. 58 Issue 2 Pg. 165-75 ( 1993) ISSN: 0268-2575 [Print] ENGLAND
PMID7764114 (Publication Type: Journal Article)
Chemical References
  • Electrolytes
  • Solutions
  • Lead
  • lead chloride
  • Hydrochloric Acid
Topics
  • Electrochemistry
  • Electrodes
  • Electrolytes
  • Hydrochloric Acid (chemistry)
  • Lead (chemistry)
  • Microscopy, Electron, Scanning
  • Solutions
  • Surface Properties
  • X-Ray Diffraction

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