Permeability and morphology of polypyrrole films synthesized with various nucleophiles

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F60461373%3A22310%2F03%3A00008008" target="_blank" >RIV/60461373:22310/03:00008008 - isvavai.cz</a>

Výsledek na webu

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DOI - Digital Object Identifier

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Jazyk výsledku

čeština

Název v původním jazyce

Permeability and morphology of polypyrrole films synthesized with various nucleophiles

Popis výsledku v původním jazyce

Polypyrrole represents one of the promising materials for preparation of composite electrodes in PEMFC. This work deals with the influence of the nature of the nucleophile incorporated into the PPy film on its morphology and hydrogen/proton permeability.Sulphate, Chloride, Polystyrene sulphonate (PSS) and Nafion 117 were used as the nucleophiles. Scanning electron microscope (SEM) was used to study PPy films morphology and impact of nucleophile nature on it. Also dependence of film thickness on charge passed was determined from SEM pictures. The PPy permeability for hydrogen/proton was determined using a limiting current technique. It is based on the division of the total current density on rotating disc electrode (RDE). As it was observed the nucleophile nature has an important effect on the electrochemically synthesised film morphology. Small nucleophiles as sulphate or chloride provide film with very rough surface. Especially chloride ions form typical "Cauliflower like" structure,

Název v anglickém jazyce

Permeability and morphology of polypyrrole films synthesized with various nucleophiles

Popis výsledku anglicky

Polypyrrole represents one of the promising materials for preparation of composite electrodes in PEMFC. This work deals with the influence of the nature of the nucleophile incorporated into the PPy film on its morphology and hydrogen/proton permeability.Sulphate, Chloride, Polystyrene sulphonate (PSS) and Nafion 117 were used as the nucleophiles. Scanning electron microscope (SEM) was used to study PPy films morphology and impact of nucleophile nature on it. Also dependence of film thickness on charge passed was determined from SEM pictures. The PPy permeability for hydrogen/proton was determined using a limiting current technique. It is based on the division of the total current density on rotating disc electrode (RDE). As it was observed the nucleophile nature has an important effect on the electrochemically synthesised film morphology. Small nucleophiles as sulphate or chloride provide film with very rough surface. Especially chloride ions form typical "Cauliflower like" structure,

Druh

D - Stať ve sborníku

CEP obor

CG - Elektrochemie

OECD FORD obor

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Projekt

<a href="/cs/project/GA104%2F02%2F0664" target="_blank" >GA104/02/0664: Studie alternativních anod pro nízkoteplotní palivové články na bázi vodivých polymerů modifikovaných platinou</a><br>

Návaznosti

P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)

Rok uplatnění

2003

Kód důvěrnosti údajů

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

Název statě ve sborníku

Advanced Batteries and Accumilators - 4rd

ISBN

80-214-2298-X

ISSN

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e-ISSN

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Počet stran výsledku

2

Strana od-do

70-71

Název nakladatele

VUT Brno

Místo vydání

Brno

Místo konání akce

Brno

Datum konání akce

15. 6. 2003

Typ akce podle státní příslušnosti

EUR - Evropská akce

Kód UT WoS článku

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