Underpotential Deposition of Silver on Pt(111). Part 1. Concentration Dependence

reportActive / Technical Report | Accession Number: ADA236692 | Open PDF

Abstract:

We report on the concentration dependence of the underpotential deposition of silver on well-defined Pt111 electrodes. Electrochemical as well as ultra high vacuum surface techniques have been employed. We have found that when the silver ion concentration is 1.00 mM the electrodeposition is via adsorption in a well-defined manner, whereas at a concentration of 0.005 mM the mechanism involves three dimensional nucleation and island formation. In addition, two monolayers of silver are deposited at underpotentials but the stability of the second layer is a strong function of the silver ion concentration in solution. When the silver ion concentration is 1.00 mM, rinsing the electrode with supporting electrolyte containing no silver in solution at controlled potential results in essentially complete removal of the second layer of silver.

Author(s):
Rodriguez, J. F. ; Taylor, D. L. ; Abruna, H. D.
Author Organization(s):
CORNELL UNIV ITHACA NY BAKER LAB
Supplementary Note:
DOI: 10.21236/ADA236692
Pagination:
0042

Security Markings

DOCUMENT & CONTEXTUAL SUMMARY

Distribution:
Approved For Public Release
Distribution Statement:
Approved For Public Release; Distribution Is Unlimited.

RECORD

Collection: TR
Identifying Numbers
Monitor Series:
ONR
 Subject Terms
Joint Capability Areas:
JCA_3.2_Engagement; JCA_3_Force Application; JCA_3.2.1_Kinetic Means; JCA_1.2.7_Experimentation; JCA_1_Force Support; JCA_1.2_Force Preparation; JCA_6.3.3_Spectrum Management; JCA_6_Net Centric
Communities of Interest:
Energy and Power Technologies
Descriptor(s):
*CONTROL, ADSORPTION, NUCLEATION, ELECTRODEPOSITION, ELECTROLYTES, SILVER, ISLANDS, ION DENSITY, LAYERS, THREE DIMENSIONAL
Field(s)/Group(s):
Electrical and Electronic Equipment
Report Date:
1990 Jan 01