Electrocatalytic Activity of Nafion-Impregnated Pyrolyzed Cobalt Phthalocyanine: A Correlative Study Between Rotating Disk and Solid Polymer Electrolyte Fuel-Cell Electrodes

G. Tamizhmani, J. P. Dodelet, D. Guay, G. Lalande

Research output: Contribution to journalArticle

66 Scopus citations

Abstract

Carbon supported electrocatalysts for the reduction of oxygen can be screened quickly by using a rotating disk electrode (RDE) when an appropriate material is used as a binder to hold the catalyst on the disk electrode. The results obtained with the RDE in an oxygen-saturated H2SO4 solution mimic those measured for a full-cell H2/O2 solid polymer electrolyte setup. This result is demonstrated with a cobalt phthalocyanine-on-carbon black catalyst pyrolyzed at various temperatures ranging from 400 to 1100°C. When the catalyst is held on the disk electrode with electropolymerized pyrrole, a broad maximum of activity for the reduction of oxygen is observed for pyrolysis temperatures ranging between 600 and 900°C. When the catalyst is dispersed in a Nafion film on the disk electrode, a sharp maximum in its activity is observed at the pyrolysis temperature of 600°C, in agreement with its behavior in a full-cell setup.

Original languageEnglish (US)
Pages (from-to)41-45
Number of pages5
JournalJournal of the Electrochemical Society
Volume141
Issue number1
DOIs
StatePublished - Jan 1994
Externally publishedYes

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Renewable Energy, Sustainability and the Environment
  • Surfaces, Coatings and Films
  • Electrochemistry
  • Materials Chemistry

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