An impedance model for analysis of EIS of polymer electrolyte fuel cells under platinum oxidation and hydrogen peroxide formation in the cathode

In this study, an impedance model based on electrochemical theory of platinum oxide formation has been developed and combined with the impedance model based on hydrogen peroxide formation during the oxygen reduction reaction (ORR) and reported in a previous study to characterise inductive loops in i...

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Main Authors:	Samuel Cruz-Manzo, Cesar Perezmitre-Cruz, Paul S. Greenwood, Rui Chen
Format:	Default Article
Published:	2016
Subjects:	Other engineering not elsewhere classified EIS Fuel cell Impedance model Oxygen reduction reaction Hydrogen peroxide Platinum oxide Engineering not elsewhere classified
Online Access:	https://hdl.handle.net/2134/21461
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id	rr-article-9224432
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spelling	rr-article-92244322016-01-01T00:00:00Z An impedance model for analysis of EIS of polymer electrolyte fuel cells under platinum oxidation and hydrogen peroxide formation in the cathode Samuel Cruz-Manzo (7120343) Cesar Perezmitre-Cruz (7122239) Paul S. Greenwood (7119647) Rui Chen (1257861) Other engineering not elsewhere classified EIS Fuel cell Impedance model Oxygen reduction reaction Hydrogen peroxide Platinum oxide Engineering not elsewhere classified In this study, an impedance model based on electrochemical theory of platinum oxide formation has been developed and combined with the impedance model based on hydrogen peroxide formation during the oxygen reduction reaction (ORR) and reported in a previous study to characterise inductive loops in impedance spectra of polymer electrolyte fuel cells (PEFCs). To validate the theoretical treatment, the simulated frequency response predicted by the theoretical model is compared against electrochemical impedance spectroscopy (EIS) measurements carried out in an open-cathode 16 cm2 H2/air PEFC stack at three different current densities. The results show that neither model in isolation (hydrogen peroxide nor platinum oxide models) can accurately reproduce the inductive loops in the EIS measurements at low frequencies. By deriving a model considering kinetics of hydrogen peroxide and platinum oxide formation, it is possible to reproduce the inductive loops at low frequencies and to estimate the DC polarisation resistance related to the slope of the polarisation curve as frequency reaches zero during EIS. This study demonstrates that different mechanisms that cause PEFC degradation and low performance could be manifested in EIS measurements simultaneously. The resulting model could support other electrochemical techniques to quantify the rates of hydrogen peroxide and platinum oxide formation during the ORR that limit the performance of PEFCs. 2016-01-01T00:00:00Z Text Journal contribution 2134/21461 https://figshare.com/articles/journal_contribution/An_impedance_model_for_analysis_of_EIS_of_polymer_electrolyte_fuel_cells_under_platinum_oxidation_and_hydrogen_peroxide_formation_in_the_cathode/9224432 CC BY-NC-ND 4.0
institution	Loughborough University
collection	Figshare
topic	Other engineering not elsewhere classified EIS Fuel cell Impedance model Oxygen reduction reaction Hydrogen peroxide Platinum oxide Engineering not elsewhere classified
spellingShingle	Other engineering not elsewhere classified EIS Fuel cell Impedance model Oxygen reduction reaction Hydrogen peroxide Platinum oxide Engineering not elsewhere classified Samuel Cruz-Manzo Cesar Perezmitre-Cruz Paul S. Greenwood Rui Chen An impedance model for analysis of EIS of polymer electrolyte fuel cells under platinum oxidation and hydrogen peroxide formation in the cathode
description	In this study, an impedance model based on electrochemical theory of platinum oxide formation has been developed and combined with the impedance model based on hydrogen peroxide formation during the oxygen reduction reaction (ORR) and reported in a previous study to characterise inductive loops in impedance spectra of polymer electrolyte fuel cells (PEFCs). To validate the theoretical treatment, the simulated frequency response predicted by the theoretical model is compared against electrochemical impedance spectroscopy (EIS) measurements carried out in an open-cathode 16 cm2 H2/air PEFC stack at three different current densities. The results show that neither model in isolation (hydrogen peroxide nor platinum oxide models) can accurately reproduce the inductive loops in the EIS measurements at low frequencies. By deriving a model considering kinetics of hydrogen peroxide and platinum oxide formation, it is possible to reproduce the inductive loops at low frequencies and to estimate the DC polarisation resistance related to the slope of the polarisation curve as frequency reaches zero during EIS. This study demonstrates that different mechanisms that cause PEFC degradation and low performance could be manifested in EIS measurements simultaneously. The resulting model could support other electrochemical techniques to quantify the rates of hydrogen peroxide and platinum oxide formation during the ORR that limit the performance of PEFCs.
format	Default Article
author	Samuel Cruz-Manzo Cesar Perezmitre-Cruz Paul S. Greenwood Rui Chen
author_facet	Samuel Cruz-Manzo Cesar Perezmitre-Cruz Paul S. Greenwood Rui Chen
author_sort	Samuel Cruz-Manzo (7120343)
title	An impedance model for analysis of EIS of polymer electrolyte fuel cells under platinum oxidation and hydrogen peroxide formation in the cathode
title_short	An impedance model for analysis of EIS of polymer electrolyte fuel cells under platinum oxidation and hydrogen peroxide formation in the cathode
title_full	An impedance model for analysis of EIS of polymer electrolyte fuel cells under platinum oxidation and hydrogen peroxide formation in the cathode
title_fullStr	An impedance model for analysis of EIS of polymer electrolyte fuel cells under platinum oxidation and hydrogen peroxide formation in the cathode
title_full_unstemmed	An impedance model for analysis of EIS of polymer electrolyte fuel cells under platinum oxidation and hydrogen peroxide formation in the cathode
title_sort	impedance model for analysis of eis of polymer electrolyte fuel cells under platinum oxidation and hydrogen peroxide formation in the cathode
publishDate	2016
url	https://hdl.handle.net/2134/21461
_version_	1797557046606823424

An impedance model for analysis of EIS of polymer electrolyte fuel cells under platinum oxidation and hydrogen peroxide formation in the cathode

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