Sum frequency generation of CO on (III) and polycrystalline platinum electrode surfaces: Evidence for SFG invisible surface CO

Baldelli, S; Markovic, N; Ross, P; Shen, Y R; Somorjai, G

doi:10.1021/jp991649x

Title: Sum frequency generation of CO on (III) and polycrystalline platinum electrode surfaces: Evidence for SFG invisible surface CO

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Abstract

The vibrational spectroscopy sum frequency generation (SFG) is used to investigate the adsorption of carbon monoxide on the single crystal (111) and polycrystalline platinum surfaces. By varying the frequency and polarization of the light beams, different surface species of CO species are probed. SFG signal intensities for different polarization indicate that adsorbed CO polarizability is significantly perturbed from the gas-phase molecule. The SFG signal of CO disappears well below the main oxidation potential of CO to CO{sub 2}. The disappearance of the CO signal is interpreted as a transformation in the CO layer to a state which is invisible to SFG. The invisible state is suggested to be CO with the bond axis nearly parallel to the platinum surface.

Authors:: Baldelli, S; Markovic, N; Ross, P; Shen, Y R; Somorjai, G

Publication Date:: Thu Oct 21 00:00:00 EDT 1999

Research Org.:: Univ. of California, Berkeley, CA (US)

OSTI Identifier:: 20001120

DOE Contract Number:: AC03-76SF00098; AC03-76SF00099

Resource Type:: Journal Article

Journal Name:: Journal of Physical Chemistry B: Materials, Surfaces, Interfaces, amp Biophysical

Additional Journal Information:: Journal Volume: 103; Journal Issue: 42; Other Information: PBD: 21 Oct 1999; Journal ID: ISSN 1089-5647

Country of Publication:: United States

Language:: English

Subject:: 40 CHEMISTRY; PLATINUM; ELECTRODES; VIBRATIONAL STATES; ADSORPTION; CARBON MONOXIDE; OXIDATION; INTERFACES

Citation Formats


                    Baldelli, S, Markovic, N, Ross, P, Shen, Y R, and Somorjai, G. Sum frequency generation of CO on (III) and polycrystalline platinum electrode surfaces: Evidence for SFG invisible surface CO.  United States: N. p., 1999. 
        Web.  doi:10.1021/jp991649x.

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                    Baldelli, S, Markovic, N, Ross, P, Shen, Y R, & Somorjai, G. Sum frequency generation of CO on (III) and polycrystalline platinum electrode surfaces: Evidence for SFG invisible surface CO.  United States.  https://doi.org/10.1021/jp991649x

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                    Baldelli, S, Markovic, N, Ross, P, Shen, Y R, and Somorjai, G. 1999.  
        "Sum frequency generation of CO on (III) and polycrystalline platinum electrode surfaces: Evidence for SFG invisible surface CO".  United States.  https://doi.org/10.1021/jp991649x.

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@article{osti_20001120,

  title        = {Sum frequency generation of CO on (III) and polycrystalline platinum electrode surfaces: Evidence for SFG invisible surface CO},

  author       = {Baldelli, S and Markovic, N and Ross, P and Shen, Y R and Somorjai, G},

  abstractNote = {The vibrational spectroscopy sum frequency generation (SFG) is used to investigate the adsorption of carbon monoxide on the single crystal (111) and polycrystalline platinum surfaces. By varying the frequency and polarization of the light beams, different surface species of CO species are probed. SFG signal intensities for different polarization indicate that adsorbed CO polarizability is significantly perturbed from the gas-phase molecule. The SFG signal of CO disappears well below the main oxidation potential of CO to CO{sub 2}. The disappearance of the CO signal is interpreted as a transformation in the CO layer to a state which is invisible to SFG. The invisible state is suggested to be CO with the bond axis nearly parallel to the platinum surface.},

  doi          = {10.1021/jp991649x},

  url          = {https://www.osti.gov/biblio/20001120},
  journal      = {Journal of Physical Chemistry B: Materials, Surfaces, Interfaces, amp Biophysical},

  issn         = {1089-5647},

  number       = 42,

  volume       = 103,

  place        = {United States},

  year         = {Thu Oct 21 00:00:00 EDT 1999},

  month        = {Thu Oct 21 00:00:00 EDT 1999}

}

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