In situ Fourier transform infrared reflection absorption spectroscopic studies of the effects of tin on the electrochemical oxidation of carbon monoxid

In Tae Bae, Takeshi Sasaki, Daniel Alberto Scherson

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Abstract

The modifications in the mode of bonding of CO on polycrystalline Pt in perchloric acid electrolytes induced by the presence of tin have been examined using in situ Fourier Transform Infrared Reflection Absorption Spectroscopy. It has been concluded, based on the results obtained, that tin adsorbs on a CO-saturated Pt surface displacing up to half of the original CO, and brings about a sizable reduction in the overpotential for CO electrooxidation. In addition, the integrated intensity of the CO peak normalized by the integrated intensity of the CO2 peak obtained after full CO oxidation appears to be much higher than the corresponding value observed on a tin-free Pt surface. This effect is especially marked for moderate tin coverages at potentials negative to the onset of CO oxidation and has been tentatively associated with the presence of CO on special sites on the tin-free polycrystalline Pt surface for which the IR cross sections are very small.

Original languageEnglish
Pages (from-to)185-195
Number of pages11
JournalJournal of Electroanalytical Chemistry
Volume297
Issue number1
DOIs
Publication statusPublished - 1991 Jan 10
Externally publishedYes

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Tin
Electrochemical oxidation
Carbon Monoxide
Fourier transforms
Carbon
Infrared radiation
Oxidation
Electrooxidation
Absorption spectroscopy
Electrolytes
Acids

ASJC Scopus subject areas

  • Analytical Chemistry
  • Chemical Engineering(all)
  • Electrochemistry

Cite this

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title = "In situ Fourier transform infrared reflection absorption spectroscopic studies of the effects of tin on the electrochemical oxidation of carbon monoxid",
abstract = "The modifications in the mode of bonding of CO on polycrystalline Pt in perchloric acid electrolytes induced by the presence of tin have been examined using in situ Fourier Transform Infrared Reflection Absorption Spectroscopy. It has been concluded, based on the results obtained, that tin adsorbs on a CO-saturated Pt surface displacing up to half of the original CO, and brings about a sizable reduction in the overpotential for CO electrooxidation. In addition, the integrated intensity of the CO peak normalized by the integrated intensity of the CO2 peak obtained after full CO oxidation appears to be much higher than the corresponding value observed on a tin-free Pt surface. This effect is especially marked for moderate tin coverages at potentials negative to the onset of CO oxidation and has been tentatively associated with the presence of CO on special sites on the tin-free polycrystalline Pt surface for which the IR cross sections are very small.",
author = "{Tae Bae}, In and Takeshi Sasaki and Scherson, {Daniel Alberto}",
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T1 - In situ Fourier transform infrared reflection absorption spectroscopic studies of the effects of tin on the electrochemical oxidation of carbon monoxid

AU - Tae Bae, In

AU - Sasaki, Takeshi

AU - Scherson, Daniel Alberto

PY - 1991/1/10

Y1 - 1991/1/10

N2 - The modifications in the mode of bonding of CO on polycrystalline Pt in perchloric acid electrolytes induced by the presence of tin have been examined using in situ Fourier Transform Infrared Reflection Absorption Spectroscopy. It has been concluded, based on the results obtained, that tin adsorbs on a CO-saturated Pt surface displacing up to half of the original CO, and brings about a sizable reduction in the overpotential for CO electrooxidation. In addition, the integrated intensity of the CO peak normalized by the integrated intensity of the CO2 peak obtained after full CO oxidation appears to be much higher than the corresponding value observed on a tin-free Pt surface. This effect is especially marked for moderate tin coverages at potentials negative to the onset of CO oxidation and has been tentatively associated with the presence of CO on special sites on the tin-free polycrystalline Pt surface for which the IR cross sections are very small.

AB - The modifications in the mode of bonding of CO on polycrystalline Pt in perchloric acid electrolytes induced by the presence of tin have been examined using in situ Fourier Transform Infrared Reflection Absorption Spectroscopy. It has been concluded, based on the results obtained, that tin adsorbs on a CO-saturated Pt surface displacing up to half of the original CO, and brings about a sizable reduction in the overpotential for CO electrooxidation. In addition, the integrated intensity of the CO peak normalized by the integrated intensity of the CO2 peak obtained after full CO oxidation appears to be much higher than the corresponding value observed on a tin-free Pt surface. This effect is especially marked for moderate tin coverages at potentials negative to the onset of CO oxidation and has been tentatively associated with the presence of CO on special sites on the tin-free polycrystalline Pt surface for which the IR cross sections are very small.

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