Utilization of metal phthalocyanines as cathode catalysts of proton exchange membrane fuel cells


Eroglu I., Erkan S., Bayrakçeken A. , Türker L.

2006 AIChE Annual Meeting, San Francisco, CA, United States Of America, 12 - 17 November 2006 identifier

  • Publication Type: Conference Paper / Full Text
  • Volume:
  • City: San Francisco, CA
  • Country: United States Of America

Abstract

Phthalocyanines of cobalt, iron, and nickel were synthesized via phthalic anhydride-urea method and used as cathode catalyst of proton exchange membrane fuel cells. Catalyst materials were prepared by the impregnation method so that each one contains either cobalt (4%), iron (4% or 10%) or nickel (4%) phthalocyanines on carbon black (Vulcan XC72) matrix. The impregnated catalysts were pyrolyzed at 600°C or 1000°C and cathode electrodes were prepared by these catalysts as well as unpyrolyzed ones obtained by the spraying technique. All of the anode electrodes were prepared by using Pt (20%) containing catalysts. The cobalt phthalocyanine based cathode catalysts were more active than iron phthalocyanine-based catalysts. The increased pyrolysis temperature showed a positive effect on the performance of the fuel cell prepared with metal phthalocyanine catalytic cathodes. Unpyrolyzed cobalt phthalocyanine impregnated on carbon black exhibited low performance. The highest power attained was 0.04 w/sq cm which was obtained by using the membrane electrode assembly having a loading density of 0.28 mg Co/sq cm, prepared from the CoPc/C catalyst pyrolyzed at 1000°C. This is an abstract of a paper presented at the AIChE Annual Meeting (San Francisco, CA 11/12-17/2006).