The Underpotential Deposition of Copper on Pt(311): Site Selective Deposition and Anion Effects

Abstract

The underpotential deposition of copper on Pt(311)=Pt(2(111)x(100)) stepped surfaces has been studied and the results are compared with those for the same processes on Pt(111) and Pt(100). We find that the adsorption/ desorption of copper on the (111) (terrace) and (100) (steps) sites of this surface takes place at different potentials so that selective adsorption on terrace or step sites is possible. The potentials, and their relative position, are different from those on Pt(111) and Pt(100) surfaces. These differences are ascribed to competitive effects from the anions which adsorb more strongly on the (100) than on the (111) sites. In addition, the presence of halides (Cl(-), Br(-)) dramatically affects the electrodeposition process.

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Document Details

Document Type
Technical Report
Publication Date
Mar 14, 1994
Accession Number
ADA278022

Entities

People

  • Héctor D. Abruña
  • J. M. Feliu
  • R. Gomez

Organizations

  • Cornell University Department of Chemistry and Chemical Biology

Tags

DTIC Thesaurus Topics

  • Adsorbates
  • Adsorption
  • Charge Density
  • Chemical Synthesis
  • Chemistry
  • Chlorides
  • Desorption
  • Halides
  • Hydrogen
  • Materials Processing
  • Materials Science
  • Military Research
  • New York
  • Single Crystals
  • Steady State
  • United States
  • Universities

Fields of Study

  • Materials science

Readers

  • Quantum Chemistry
  • Thin Film Deposition Science.