Estimating parameters from rotating ring disc electrode measurements
- Authors: Santhanagopalan S.1, White R.E.2
- 
							Affiliations: 
							- Transportation and Hydrogen Systems Center
- Department of Chemical Engineering
 
- Issue: Vol 53, No 10 (2017)
- Pages: 1087-1099
- Section: Section 1. Mass and Charge Transfer
- URL: https://journals.rcsi.science/1023-1935/article/view/189067
- DOI: https://doi.org/10.1134/S1023193517100111
- ID: 189067
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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.
About the authors
Shriram Santhanagopalan
Transportation and Hydrogen Systems Center
														Email: white@engr.sc.edu
				                					                																			                												                	United States, 							Golden, CO, 80401						
Ralph E. White
Department of Chemical Engineering
							Author for correspondence.
							Email: white@engr.sc.edu
				                					                																			                												                	United States, 							Columbia, SC, 29208						
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