Microstructural analysis of catalyst/catalyst support interfaces of PEFC electrocatalysts

J. T. Chou, Kazunari Sasaki

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Abstract

In this study, we observed the catalyst/catalyst support interfaces of Polymer Electrolyte Fuel Cell (PEFC) electrocatalysts by High-Resolution TEM. As the catalyst supports, various carbon nanofibers, including VGCF (Vapor-grown carbon fibers), Platelet type carbon nanofibers and Herringbone-type carbon nanofibers, were applied. We found larger Platinum particles in the Pt/VGCF. The interfacial structure was identified to be the (111)Pt//(0001)Graphite, so that its boundary is relatively stable, whereas particle growth could easily occur. On the contrary, in the Pt/Platelet and in the Pt/Herringbone, well-dispersed Platinum particles were observed, as the catalyst/catalyst support interface is rather unstable. Moreover, twin was observed in the Platinum particles supported on the Herringbone-type nanofibers.

Original languageEnglish
Pages (from-to)1405-1408
Number of pages4
JournalSolid State Ionics
Volume179
Issue number27-32
DOIs
Publication statusPublished - Sep 30 2008

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All Science Journal Classification (ASJC) codes

  • Chemistry(all)
  • Materials Science(all)
  • Condensed Matter Physics

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