In-Situ X-Ray Studies of the Underpotential Deposition of Copper on Platinum (111)

Abstract

In-situ x-ray flourescence detected surface EXAFS spectroscopy has been employed to elucidate the in-plane structure of copper underpotentially deposited on a clean and well ordered platinum (111) single crystal electrode. XANES and EXAFS analyses were made as function of applied potential (+0.2V, +0.1V, and 0.0V) corresponding to coverages of approximately 0.5ML, 0.75ML and 1ML, respectively. The charge derived from electrochemical measurements indicate that at the three potentials studied the electrodeposited copper was not completely discharged. The XANES analysis revealed similarities between the electrodeposited copper and the Cu2O reference lending support to earlier findings of a partially discharged copper ad-layer. EXAFS results suggest two cluster phases at the most positive potential (+0.2V) studied and an epitaxial arrangement at the most negative potential (0.0V).

Open PDF

Document Details

Document Type
Technical Report
Publication Date
Jan 01, 1992
Accession Number
ADA263361

Entities

People

  • Howell S. Yee
  • Héctor D. Abruña

Organizations

  • Cornell University

Tags

Communities of Interest

  • Air Platforms
  • Energy and Power Technologies

DTIC Thesaurus Topics

  • Absorption
  • Absorption Spectra
  • Backscattering
  • Charge Transfer
  • Chemistry
  • Detectors
  • Diffraction
  • Distribution Functions
  • Electrochemical Cells
  • Electrodeposition
  • High Energy
  • Materials
  • Measurement
  • Military Research
  • New York
  • Scattering
  • Spectra

Fields of Study

  • Physics

Readers

  • Electrochemical Surface Science
  • Thin Film Deposition Science.