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Title: Estimating parameters from rotating ring disc electrode measurements

Journal Article · · Russian Journal of Electrochemistry
 [1];  [2]
  1. National Renewable Energy Lab. (NREL), Golden, CO (United States). Transportation and Hydrogen Systems Center
  2. Univ. of South Carolina, Columbia, SC (United States). Dept. of Chemical Engineering

Rotating ring disc electrode (RRDE) experiments are a classic tool for investigating kinetics of electrochemical reactions. Several standardized methods exist for extracting transport parameters and reaction rate constants using RRDE measurements. Here in this work, we compare some approximate solutions to the convective diffusion used popularly in the literature to a rigorous numerical solution of the Nernst-Planck equations coupled to the three dimensional flow problem. In light of these computational advancements, we explore design aspects of the RRDE that will help improve sensitivity of our parameter estimation procedure to experimental data. We use the oxygen reduction in acidic media involving three charge transfer reactions and a chemical reaction as an example, and identify ways to isolate reaction currents for the individual processes in order to accurately estimate the exchange current densities.

Research Organization:
National Renewable Energy Lab. (NREL), Golden, CO (United States)
Sponsoring Organization:
USDOE Office of Energy Efficiency and Renewable Energy (EERE), Vehicle Technologies Office (EE-3V)
Grant/Contract Number:
AC36-08GO28308
OSTI ID:
1407467
Report Number(s):
NREL/JA-5400-68209
Journal Information:
Russian Journal of Electrochemistry, Vol. 53, Issue 10; ISSN 1023-1935
Publisher:
SpringerCopyright Statement
Country of Publication:
United States
Language:
English
Citation Metrics:
Cited by: 6 works
Citation information provided by
Web of Science

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