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Title: A novel method for generating quantitative local electrochemical impedance spectroscopy

Abstract

This paper reports on a local electrochemical impedance spectroscopy (LEIS) technique for mapping the ac impedance distribution, as a function of frequency, of an electrode. In LEIS, as in traditional ac impedance methods, a sinusoidal voltage perturbation between the working and reference electrode is maintained by driving an ac current between the working electrode and a distant counterelectrode with a potentiostat. Local ac impedances are then derived from the ratio of the applied ac voltage and the local ac solution current density. The local ac current density is obtained from potential difference measurements near the electrode surface using a probe consisting of two micro-electrodes. By measuring the ac potential difference between the micro-electrodes, and knowing their separation distance and the solution conductivity, the local ac solution current density is derived. The accuracy of the local ac impedance data generated with this technique was established by investigating two model systems.

Authors:
 [1];  [2];  [3]
  1. Dept. of Materials Science and Engineering, Johns Hopkins Univ., Baltimore, MD (US)
  2. Dept. of Mechanical Engineering, United States Naval Academy, Annapolis, MD (US)
  3. Dept. of Applied Science, Brookhaven National Lab., Upton, NY (US)
Publication Date:
OSTI Identifier:
5023548
DOE Contract Number:  
AC02-76CH00016
Resource Type:
Journal Article
Journal Name:
Journal of the Electrochemical Society; (United States)
Additional Journal Information:
Journal Volume: 139:4; Journal ID: ISSN 0013-4651
Country of Publication:
United States
Language:
English
Subject:
37 INORGANIC, ORGANIC, PHYSICAL AND ANALYTICAL CHEMISTRY; 74 ATOMIC AND MOLECULAR PHYSICS; 71 CLASSICAL AND QUANTUM MECHANICS, GENERAL PHYSICS; Ta; ELECTRODES; ELECTRIC IMPEDANCE; ALTERNATING CURRENT; CURRENT DENSITY; ELECTROCHEMISTRY; POTENTIOSTATS; SPECTROSCOPY; CHEMISTRY; CURRENTS; ELECTRIC CURRENTS; IMPEDANCE; MEASURING INSTRUMENTS; 400400* - Electrochemistry; 664200 - Spectra of Atoms & Molecules & their Interactions with Photons- (1992-); 661220 - Particle Beam Production & Handling; Targets- (1992-)

Citation Formats

Lillard, R S, Moran, P J, and Isaacs, H S. A novel method for generating quantitative local electrochemical impedance spectroscopy. United States: N. p., 1992. Web. doi:10.1149/1.2069332.
Lillard, R S, Moran, P J, & Isaacs, H S. A novel method for generating quantitative local electrochemical impedance spectroscopy. United States. https://doi.org/10.1149/1.2069332
Lillard, R S, Moran, P J, and Isaacs, H S. 1992. "A novel method for generating quantitative local electrochemical impedance spectroscopy". United States. https://doi.org/10.1149/1.2069332.
@article{osti_5023548,
title = {A novel method for generating quantitative local electrochemical impedance spectroscopy},
author = {Lillard, R S and Moran, P J and Isaacs, H S},
abstractNote = {This paper reports on a local electrochemical impedance spectroscopy (LEIS) technique for mapping the ac impedance distribution, as a function of frequency, of an electrode. In LEIS, as in traditional ac impedance methods, a sinusoidal voltage perturbation between the working and reference electrode is maintained by driving an ac current between the working electrode and a distant counterelectrode with a potentiostat. Local ac impedances are then derived from the ratio of the applied ac voltage and the local ac solution current density. The local ac current density is obtained from potential difference measurements near the electrode surface using a probe consisting of two micro-electrodes. By measuring the ac potential difference between the micro-electrodes, and knowing their separation distance and the solution conductivity, the local ac solution current density is derived. The accuracy of the local ac impedance data generated with this technique was established by investigating two model systems.},
doi = {10.1149/1.2069332},
url = {https://www.osti.gov/biblio/5023548}, journal = {Journal of the Electrochemical Society; (United States)},
issn = {0013-4651},
number = ,
volume = 139:4,
place = {United States},
year = {Wed Apr 01 00:00:00 EST 1992},
month = {Wed Apr 01 00:00:00 EST 1992}
}