Article thumbnail

1 H and 19 F FFC-NMR of catalyst layer materials for polymer electrolyte membrane fuel cells

By Makoto Yamaguchi and Akihiro Ohira

Abstract

1H and 19F spin lattice relaxation rates of catalyst layer materials (CLM) of polymer electrolyte membrane fuel cells were measured by the fast field cycling (FFC) method. In contrast to ionomer membranes, 1H relaxation rates of adsorbed water in both platinum-Ketjen black (Pt-KB) catalyst powder and CLM were strongly dependent on Larmor frequency approximated by a power law due to the strong surface interaction of adsorbed water. The difference in the frequency dependence in the Pt-KB and the CLM was attributed to higher acidity of the CLM

Topics: info:eu-repo/classification/ddc/530, ddc:530, Diffusion, Transport, diffusion, transport
Year: 2013
OAI identifier: oai:qucosa:de:qucosa:13725
Provided by: Qucosa
Download PDF:
Sorry, we are unable to provide the full text but you may find it at the following location(s):
  • https://ul.qucosa.de/id/qucosa... (external link)
  • https://ul.qucosa.de/api/qucos... (external link)
  • Suggested articles


    To submit an update or takedown request for this paper, please submit an Update/Correction/Removal Request.