Digital simulation of galvanostatic current-potential data for gas-diffusion electrodes and estimation of electrode-kinetic parameters

Aricò, A. S. ; Shukla, A. K. ; Antonucci, V. ; Giordano, N. (1994) Digital simulation of galvanostatic current-potential data for gas-diffusion electrodes and estimation of electrode-kinetic parameters Journal of Power Sources, 50 (1-2). pp. 177-186. ISSN 0378-7753

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Official URL: http://www.sciencedirect.com/science/article/pii/0...

Related URL: http://dx.doi.org/10.1016/0378-7753(94)01901-0

Abstract

A computerized non-linear-least-squares regression procedure to analyse the galvanostatic current-potential data for kinetically hindered reactions on porous gas-diffusion electrodes is reported. The simulated data fit well with the corresponding measured values. The analytical estimates of electrode-kinetic parameters and uncompensated resistance are found to be in good agreement with their respective values obtained from Tafel plots and the current-interrupter method. The procedure circumvents the need to collect the data in the limiting-current region where the polarization values are usually prone to errors. The polarization data for two typical cases, namely, methanol oxidation on a carbon-supported platinum-tin electrode and oxygen reduction on a Nafion-coated platinized carbon electrode are successfully analysed.

Item Type:Article
Source:Copyright of this article belongs to Elsevier Science.
ID Code:84719
Deposited On:27 Feb 2012 13:21
Last Modified:27 Feb 2012 13:21

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