, Volume 4, Issue 2, pp 101–103 | Cite as

Chemisorption-Isotherm Measurements at Electrode Surfaces by Quantitative High-Resolution Electron Energy Loss Spectroscopy

  • Jean Sanabria-Chinchilla
  • Xiaole Chen
  • Ding Li
  • Manuel P. Soriaga


The chemisorption isotherm of benzoquinone at a well-defined Pd(100) surface was obtained by quantitative high-resolution electron energy loss spectroscopy (HREELS). Extraction of surface-coverage information from HREELS required the normalization of integrated peak intensities to compensate for differences in the backscattered electron flux brought about by the organic adlayer. A common procedure rests on a match of the elastic-peak heights, but it fails for organic adsorbates since those introduce surface roughness that result in a higher stream of inelastically scattered electrons. A more accurate method is based on the equalization of the incident electron beam currents. This is attained only when the background intensities integrated over a peak-free spectral region are set equal to one another. The HREELS-generated isotherm was compared with that acquired by thin-layer electrochemical measurements; excellent agreement was observed.


High-resolution electron energy loss spectroscopy Chemisorption isotherms Surface coverage measurements by HREELS Background-intensity normalization of HREEL spectra HREELS of benzoquinone chemisorbed on Pd(100) electrodes 



This material is based upon work performed by the Joint Center for Artificial Photosynthesis, a DOE Energy Innovation Hub, as follows: The HREELS spectral analysis and surface-coverage determination were supported through the Office of Science of the US Department of Energy under award no. DE-SC0004993; the TLE and HREELS experimental measurements were supported by The Welch Foundation (A-1064).


  1. 1.
    M.P. Soriaga, A.T. Hubbard, J Am Chem Soc 104, 2735 (1982)CrossRefGoogle Scholar
  2. 2.
    M.P. Soriaga, R.J. Barriga, in Handbook of surface imaging and visualization. Chapter 34, ed. by A.T. Hubbard (CRC Press, Boca Raton, 1995)Google Scholar
  3. 3.
    M.P. Soriaga, E. Binamira-Soriaga, A.T. Hubbard, J.B. Benziger, K.W.P. Pang, Inorg Chem 24, 65 (1985)CrossRefGoogle Scholar
  4. 4.
    D.P. Woodruff, T.A. Delchar, Modern techniques of surface science (Cambridge University Press, New York, 1986)Google Scholar
  5. 5.
    K.-W.P. Pang, J.B. Benziger, M.P. Soriaga, A.T. Hubbard, J Phys Chem 88, 4583 (1984)CrossRefGoogle Scholar
  6. 6.
    H. Ibach, D.L. Mills, Electron energy loss spectroscopy and surface vibrations (Academic, New York, 1982)Google Scholar
  7. 7.
    I. Jungwirthová, L.L. Kesmodel, J Phys Chem B 105, 674 (2001)CrossRefGoogle Scholar
  8. 8.
    X. Chen, J. Sanabria-Chinchilla, M.P. Soriaga, Electroanal 17, 2121 (2005)CrossRefGoogle Scholar
  9. 9.
    M.P. Soriaga, Prog Surf Sci 39, 325 (1992)CrossRefGoogle Scholar
  10. 10.
    P. Avouris, J. Demuth, Ann Rev Phys Chem 35, 49 (1984)CrossRefGoogle Scholar
  11. 11.
    J.E. Soto, Y.-G. Kim, X. Chen, Y.-S. Park, M.P. Soriaga, J Electroanal Chem 500, 374 (2001)CrossRefGoogle Scholar

Copyright information

© Springer Science+Business Media New York 2013

Authors and Affiliations

  • Jean Sanabria-Chinchilla
    • 1
  • Xiaole Chen
    • 2
  • Ding Li
    • 2
  • Manuel P. Soriaga
    • 1
    • 2
  1. 1.Joint Center for Artificial Photosynthesis, Division of Chemistry and Chemical EngineeringCalifornia Institute of TechnologyPasadenaUSA
  2. 2.Department of ChemistryTexas A&M UniversityCollege StationUSA

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