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Journal of Applied Electrochemistry

, Volume 31, Issue 9, pp 1025–1031 | Cite as

Iron(III) tetramethoxyphenylporphyrin (FeTMPP-C1) as electrocatalyst for oxygen reduction in direct methanol fuel cells

  • G.-Q Sun
  • J.-T Wang
  • S. Gupta
  • R. F. Savinell
Article
  • 199 Downloads

Abstract

Iron(III) tetramethoxyphenylporphyrins (FeTMPP-C1) adsorbed on high-area carbons were heat treated in an inert atmosphere at various temperatures ranging from 200–1000 °C to produce catalyst for the electroreduction of oxygen in acid electrolytes. It was found that the specific surface area of the FeTMPP-C1/C catalysts linearly decreases with increase of the FeTMPP-C1 loading on RB carbon. The electrical resistivity of the catalyst decreases with the increase of heat treatment temperature in the range of 200 to 800 °C, then it increases beyond 800 °C. The results obtained with elemental analysis, FTIR spectroscopy and XPS techniques indicate that the onset temperature for partial decomposition for the FeTMPP chelate occurs at temperatures of about 400–500 °C. The surface concentrations of both iron and nitrogen on the carbon support increase as the heat treatment temperature increases, and the maximum occurs at 700 °C. Some possibilities about the nature of active sites in the catalyst are discussed.

carbon supports oxygen cathodes PBI PEM 

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Copyright information

© Kluwer Academic Publishers 2001

Authors and Affiliations

  • G.-Q Sun
    • 1
  • J.-T Wang
    • 1
  • S. Gupta
    • 1
  • R. F. Savinell
    • 1
  1. 1.Department of Chemical Engineering and Ernest B. Yeager Center for Electrochemical SciencesCase Western Reserve UniversityClevelandUSA

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