Comparison Between Surface-Enhanced Raman and Surface Infrared Spectroscopies For Strongly Perturbed Adsorbates: Thiocyanate at Gold Electrodes

Abstract

The potential-dependent C-N stretching mode, v sub CN, for thiocyanate adsorbed at the gold-aqueous interface is examined by both surface- enhanced Raman spectroscopy (SERS) and subtractively normalized interfacial Fourier transform infrared spectroscopy (SNIFTIRS). Both SERS and SNIFTIRS exhibit a v sub CN frequencies were very similar (within ca. 5/cm) for the SNIFTIRS at smooth and electrochemically roughened gold, as well as for SNIFTIRS and SERS on the latter surface. This suggests that the SERS-active sites do not differ substantially from the preponderant sites sensed by SNIFTIRS. Some features of the SER spectra suggest that N- as well as S-bound adsorbed thiocyanate exists at far negative potentials.

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Document Details

Document Type
Technical Report
Publication Date
Aug 01, 1985
Accession Number
ADA159954

Entities

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  • Dennis S. Corrigan
  • John K. Foley
  • Michael J. Weaver
  • Ping Gao
  • Stanley Pons

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  • Purdue University

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  • Chemistry
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  • Infrared Spectra
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  • Raman Scattering
  • Raman Spectroscopy
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