CATALYST UTILIZATION OF ELECTRODES WITH SULFONATED POLY ETHER ETHER KETON (SPEEK) IONOMER

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RAHNAVARD A.; ROWSHANZAMIR S.

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Seminar Paper

Paper Information

Seminar: IRANIAN FUEL CELL SEMINAR
Year:2012 | Issue:5

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Title

CATALYST UTILIZATION OF ELECTRODES WITH SULFONATED POLY ETHER ETHER KETON (SPEEK) IONOMER

Author(s)

RAHNAVARD A. | ROWSHANZAMIR S. | Issue Writer Certificate

Keywords

SULFONATED POLY ETHER ETHER KETON

CYCLIC VOLTAMMETRY

POLYMER ELECTROLYTE MEMBRANE

PLATINUM UTILIZATION

Abstract

IN A FUEL CELL SYSTEM, THE ELECTROCHEMICAL REACTIONS TAKE PLACE AT THE THREE-PHASE BOUNDARY WHERE THE ELECTROLYTE, ELECTROCATALYST LAYER AND GASEOUS FUEL ALL CONTACT TOGETHER IN THE MEA. A HIGH THREE-PHASE BOUNDARY ELECTRODE PROMOTES A GOOD GAS AND WATER DIFFUSION, PROTON TRANSPORT AND ELECTRON TRANSPORT TO AND FROM THE CATALYTIC SITES. THE QUALITY OF THE THREE-PHASE BOUNDARY DEPENDS SIGNIFICANTLY ON THE FABRICATION PROCEDURE OF THE MEA, IN ADDITION TO OTHER IMPORTANT PARAMETERS, SUCH AS THE ELECTROCATALYST LOADING AND IONOMER LOADING. AS A KEY COMPONENT OF ELECTRODE, THE ELECTRODE IONOMER FORMS THE IONOMER NETWORK IN THE CATALYST LAYER AND ACTS AS A PROTON CONDUCTING MEDIUM. IN ADDITION, SINCE THE ELECTRODE IONOMER CAUSES CHANGE OF THE PORE STRUCTURE IN THE CATALYST LAYER, IT HAS A GREAT INFLUENCE ON CATALYST UTILIZATION AND GAS TRANSFER TO THE CATALYST. SULFONATED POLY ETHER-ETHER KETONE (SPEEK) HAS A POTENTIAL FOR PROTON EXCHANGE FUEL CELL APPLICATIONS. IN THIS STUDY SPEEK WAS PREPARED BY THE SULFONATION OF PEEK. THE DEGREE OF SULFONATION WAS DETERMINED 65% BY H-NMR. THE RESULTS SHOWED THAT IN 25 WEIGHT PERCENT OF SPEEK IONOMER IN THE CATALYST LAYER, PLATINUM UTILIZATION AND ELECTROCHEMICAL ACTIVE SURFACE ARE MAXIMUM.

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APA: Copy

RAHNAVARD, A., & ROWSHANZAMIR, S.. (2012). CATALYST UTILIZATION OF ELECTRODES WITH SULFONATED POLY ETHER ETHER KETON (SPEEK) IONOMER. IRANIAN FUEL CELL SEMINAR. SID. https://sid.ir/paper/907954/en

Vancouver: Copy

RAHNAVARD A., ROWSHANZAMIR S.. CATALYST UTILIZATION OF ELECTRODES WITH SULFONATED POLY ETHER ETHER KETON (SPEEK) IONOMER. 2012. Available from: https://sid.ir/paper/907954/en

IEEE: Copy

A. RAHNAVARD, and S. ROWSHANZAMIR, “CATALYST UTILIZATION OF ELECTRODES WITH SULFONATED POLY ETHER ETHER KETON (SPEEK) IONOMER,” presented at the IRANIAN FUEL CELL SEMINAR. 2012, [Online]. Available: https://sid.ir/paper/907954/en

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