Nucleation of Pb electrodeposits on Ag and Cu
Initial stages in the electrocrystallization of Pb (up to 200A thick) from 1M NaClO/sub 4/, 0.5 and 5 mM Pb (NO/sub 3/)/sub 2/, pH 3, on Ag(111) and Cu(111) have been investigated by ellipsometry and light scattering during cyclic voltammetry. Optical constants, thickness, valence, and free energy of adsorption of the underpotential deposit have been determined. An optical model which agrees with experimental data for fractional coverage by the underpotential deposit is based on the twodimensional spreading of islands of monolayer thickness. The bulk deposit immediately following formation of the underpotential monolayer involves three-dimensional growth from nucleation centers, even at the 20A level of deposit thickness, and results in a particulate, porous film on top of the underpotential deposit
- Research Organization:
- Materials and Molecular Research Division, Lawrence Berkeley Laboratory University of California, Berkeley, California
- OSTI ID:
- 5956861
- Journal Information:
- J. Electrochem. Soc.; (United States), Vol. 132:1
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
36 MATERIALS SCIENCE
COPPER
ELECTRODEPOSITION
ELECTRIC BATTERIES
FABRICATION
LEAD
NUCLEATION
SILVER
CHLORATES
CRYSTAL GROWTH
CRYSTALLIZATION
OPTICAL PROPERTIES
SODIUM COMPOUNDS
THIN FILMS
ALKALI METAL COMPOUNDS
CHLORINE COMPOUNDS
DEPOSITION
ELECTROCHEMICAL CELLS
ELECTROLYSIS
ELEMENTS
FILMS
HALOGEN COMPOUNDS
LYSIS
METALS
OXYGEN COMPOUNDS
PHASE TRANSFORMATIONS
PHYSICAL PROPERTIES
SURFACE COATING
TRANSITION ELEMENTS
250901* - Energy Storage- Batteries- Design & Development
360101 - Metals & Alloys- Preparation & Fabrication