X-ray Photoelectron Spectroscopy Investigation on Electrochemical Degradation of Proton Exchange Membrane Fuel Cell Electrodes

Shuang Ma Andersen, Rajnish Dhiman, Eivind Morten Skou

Research output: Contribution to journalJournal articleResearchpeer-review

Abstract

X-ray photoelectron spectroscopy studies were systematically carried out on the electrodes before and after the electrochemical stress tests in an aqueous electrolyte at 20 °C and 70 °C. The electrodes have different ionomer structures (no ionomer, only ionomer, physically mixed ionomer and hot pressed ionomer) but have identical, commercial catalyst and catalyst loading. A significant degree of carbon corrosion, platinum migration and ionomer degradation were observed in the electrodes after the treatment. The degradation of the ionomer in the electrode is more severe than that of membrane. The electrode structure and the corresponding interface are crucial for the catalyst performance and durability.
Original languageEnglish
JournalJournal of Power Sources
Volume282
Pages (from-to)87-94
ISSN0378-7753
DOIs
Publication statusPublished - 2015

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