Estimating Parameters from Rotating Ring Disc Electrode Measurements

Shriram Santhanagopalan, Ralph White

Research output: Contribution to journalArticlepeer-review

8 Scopus Citations

Abstract

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. 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.
Original languageAmerican English
Pages (from-to)1087-1099
Number of pages13
JournalRussian Journal of Electrochemistry
Volume53
Issue number10
DOIs
StatePublished - 2017

NREL Publication Number

  • NREL/JA-5400-68209

Keywords

  • hydrodynamics
  • rotating ring disc electrodes
  • sensitivity analysis
  • simultaneous reactions

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