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

Abstract

We report on the concentration dependence of the underpotential deposition of silver on well-defined Pt(111) 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.

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Document Details

Document Type
Technical Report
Publication Date
Jan 01, 1990
Accession Number
ADA236692

Entities

People

  • D. L. Taylor
  • Héctor D. Abruña
  • J. F. Rodriguez

Organizations

  • Cornell University

Tags

Communities of Interest

  • Energy and Power Technologies

DTIC Thesaurus Topics

  • Auger Electron Spectroscopy
  • Auger Electrons
  • Cells
  • Chemistry
  • Diffraction
  • Electrochemical Cells
  • Electrochemistry
  • Electrodeposition
  • Electrodes
  • Electron Spectroscopy
  • Electrons
  • Instrumentation
  • Mass Spectrometers
  • Military Research
  • Spectra
  • Spectroscopy
  • Voltammetry

Fields of Study

  • Materials science

Readers

  • Electrochemical Surface Science
  • Thin Film Deposition Science.