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

Sanabria-Chinchilla, Jean and Chen, Xiaole and Li, Ding and Soriaga, Manuel P. (2013) Chemisorption-Isotherm Measurements at Electrode Surfaces by Quantitative High-Resolution Electron Energy Loss Spectroscopy. Electrocatalysis, 4 (2). pp. 101-103. ISSN 1868-2529. doi:10.1007/s12678-013-0125-6.

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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.

Item Type:Article
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Soriaga, Manuel P.0000-0002-0077-6226
Additional Information:© 2013 Springer Science+Business Media New York. Published online: 31 January 2013. 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).
Funding AgencyGrant Number
Department of Energy (DOE)DE-SC0004993
Robert A. Welch FoundationA-1064
Subject Keywords: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
Issue or Number:2
Record Number:CaltechAUTHORS:20130606-094123039
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Official Citation:Sanabria-Chinchilla, J., Chen, X., Li, D. et al. Electrocatalysis (2013) 4: 101. doi:10.1007/s12678-013-0125-6
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:38829
Deposited By: Tony Diaz
Deposited On:25 Jun 2013 16:32
Last Modified:09 Nov 2021 23:40

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