Fuel cell catalyst degradation on the nanoscale

A newly developed methodology for examining fuel cell catalyst degradation is introduced. In contrast to the conventional, destructive TEM investigation procedure, this methodology enables the observation of corrosion processes of the same catalyst region repeatedly. In particular we demonstrate the...

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Published inElectrochemistry communications Vol. 10; no. 8; pp. 1144 - 1147
Main Authors Mayrhofer, Karl J.J., Meier, Josef C., Ashton, Sean J., Wiberg, Gustav K.H., Kraus, Florian, Hanzlik, Marianne, Arenz, Matthias
Format Journal Article
LanguageEnglish
Published Lausanne Elsevier B.V 01.08.2008
Amsterdam Elsevier Science
New York, NY
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Summary:A newly developed methodology for examining fuel cell catalyst degradation is introduced. In contrast to the conventional, destructive TEM investigation procedure, this methodology enables the observation of corrosion processes of the same catalyst region repeatedly. In particular we demonstrate the impact of a potential cycling treatment on a carbon-supported platinum catalyst, and propose a new corrosion mechanism for fuel cell catalyst degradation. Under the applied harsh conditions, whole Pt particles detach from the support and dissolve into the electrolyte without re-deposition.
ISSN:1388-2481
1873-1902
DOI:10.1016/j.elecom.2008.05.032