A Study of Bisulfate Adsorption on PT(111) Single Crystal Electrodes Using In-situ Fourier Transform Infrared Spectroscopy

Abstract

Subtractively normalized interfacial Fourier transform spectroscopy (SNIFTIRS) has yielded the first spectroscopic evidence that bisulfate anion adsorption is associated with the anomalous peaks seen in the cyclic voltammetry of Pt(111) in sulfuric acid. The infrared data indicates that the beginning of bisulfate anion adsorption coincides with onset of the anomalous peak region (about+0.15 V vs SCE in 0.05 M H2SO4). The same IR spectra afford no evidence of sulfate anion adsorption on the Pt (111) single crystal electrode, over the potential range studied (-0.26 to +0.70 V vs SCE). Over this same potential region the adsorbed bisulfate absorption peak position showed a strong potential dependence. This increase in peak position with increasingly anodic potentials is rationalized using molecular orbital arguments. Keywords: Bisulfate adsorption; Platinum; Single crystal electrodes; Fourier transform infrared.

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Document Details

Document Type
Technical Report
Publication Date
Aug 10, 1989
Accession Number
ADA211352

Entities

People

  • C. Fierro
  • E. Yeager
  • N. Markovic
  • P. W. Faguy
  • R. R. Adzic

Organizations

  • Case Western Reserve University

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Communities of Interest

  • Advanced Electronics
  • Materials and Manufacturing Processes

DTIC Thesaurus Topics

  • Charge Density
  • Chemistry
  • Crystals
  • Desorption
  • Electric Fields
  • Electrochemical Cells
  • Electrodes
  • Energy Bands
  • Frequency
  • Frequency Bands
  • Infrared Spectroscopy
  • Measurement
  • Military Research
  • Single Crystals
  • Spectra
  • Spectroscopy
  • Universities

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  • Electrochemical Surface Science
  • Materials Science and Engineering.
  • Spectroscopy.

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