Two-dimensional dynamic mathematical model of catalytic layer degradation in PEM type fuel cell

Kód výsledku v IS VaVaI

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Výsledek na webu

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DOI - Digital Object Identifier

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Jazyk výsledku

angličtina

Název v původním jazyce

Two-dimensional dynamic mathematical model of catalytic layer degradation in PEM type fuel cell

Popis výsledku v původním jazyce

The goal of this work is to present a mathematical model of the catalytic layer degradation in the PEM type fuel cell. The proposed model is dynamic and two-dimensional. It enables the description of the Pt dissolution and Pt2+ transport in the system atdifferent operational conditions. The model system is represented by a single cell which is considered as multiphase and macro-homogeneous. The considered degradation reactions are: (i) electrochemical dissolution and (ii) electrochemical oxidation of platinum, (iii) chemical oxidation of platinum and (iv) chemical reduction of Pt2+ in the membrane. Ostwald ripening is also taken into account. The system of partial differential equations is solved by finite element method implemented in the COMSOL Multiphysics(R) environment. It was observed that the degradation processes are significantly dependent on the operational conditions so, as the highest degradation rate was observed at voltage cycling mode in the range between 1.2 and 0.8 V.

Název v anglickém jazyce

Two-dimensional dynamic mathematical model of catalytic layer degradation in PEM type fuel cell

Popis výsledku anglicky

The goal of this work is to present a mathematical model of the catalytic layer degradation in the PEM type fuel cell. The proposed model is dynamic and two-dimensional. It enables the description of the Pt dissolution and Pt2+ transport in the system atdifferent operational conditions. The model system is represented by a single cell which is considered as multiphase and macro-homogeneous. The considered degradation reactions are: (i) electrochemical dissolution and (ii) electrochemical oxidation of platinum, (iii) chemical oxidation of platinum and (iv) chemical reduction of Pt2+ in the membrane. Ostwald ripening is also taken into account. The system of partial differential equations is solved by finite element method implemented in the COMSOL Multiphysics(R) environment. It was observed that the degradation processes are significantly dependent on the operational conditions so, as the highest degradation rate was observed at voltage cycling mode in the range between 1.2 and 0.8 V.

Druh

D - Stať ve sborníku

CEP obor

CG - Elektrochemie

OECD FORD obor

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Projekt

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Návaznosti

S - Specificky vyzkum na vysokych skolach

Rok uplatnění

2012

Kód důvěrnosti údajů

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Název statě ve sborníku

New trends in application of photo and electro catalysis

ISBN

978-80-7080-809-2

ISSN

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e-ISSN

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Počet stran výsledku

5

Strana od-do

107-111

Název nakladatele

VŠCHT Praha

Místo vydání

Praha

Místo konání akce

Hnanice, Czech republic

Datum konání akce

5. 12. 2011

Typ akce podle státní příslušnosti

EUR - Evropská akce

Kód UT WoS článku

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