A Study of the Gold/Cyanide Solution Interphase by In-Situ Polarization Modulated FT IRRAS (Fourier Transform Infrared Reflection Absorption Spectroscopy).

Abstract

Polarization modulated Fourier transform infrared reflection absorption spectroscopy (FT-IR-RAS) is used to study the interphase between polycrystalline gold electrodes and 0.5 M K2SO4 solution as a function of potential and CN(-) concentration. Surface cyanide species, adsorbed on the gold electrode, give rise to a C-N stretching band at 2105/cm at -1.0V (Ag/AgC1) which undergoes a shift of approximately 30/cm/V to higher wavenumber at more positive potentials. The species is identified as linearly adsorbed CN(-) ions. The Au(CN)2- complex, which gives rise to a C-N stretching mode at -1.0 V(Ag/AgC1) is less than ca. 10/cm from low coverage to saturation coverage. Experiments using isotopic mixtures of 12CN and 13CN show that this shift is due to direct lateral interactions between adsorbed cyanide ions. Keywords: Infrared, Vibrational spectroscopy, Electrochemistry, Gold, Cyanide.

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Document Details

Document Type
Technical Report
Publication Date
Nov 01, 1987
Accession Number
ADA189140

Entities

People

  • H. Seki
  • J. G. Gordon Ii
  • K. Kunimatsu
  • M. R. Philpott
  • W. G. Golden

Organizations

  • International Business Machines Corporation (Armonk, NY)

Tags

Communities of Interest

  • Materials and Manufacturing Processes

DTIC Thesaurus Topics

  • Classification
  • Electrochemistry
  • Electrodes
  • Frequency
  • Frequency Shift
  • Infrared Windows
  • Military Research
  • Polycrystals
  • Radiation
  • Raman Spectroscopy
  • Reflection
  • Saturation
  • Scattering
  • Security
  • Spectra
  • Spectroscopy
  • Windows

Readers

  • Atmospheric Science / Meteorology, specifically Wind Wave Turbulence.
  • Electrochemical Surface Science
  • Materials Science and Engineering.