Journal
JOURNAL OF POWER SOURCES
Volume 185, Issue 1, Pages 423-427Publisher
ELSEVIER SCIENCE BV
DOI: 10.1016/j.jpowsour.2008.06.041
Keywords
Catalyst support; Durability; Fuel cell; Graphitic carbon; Mesopores; Carbon black
Funding
- Department of Energy
- DOE EERE
- Center for Nanophase Materials Sciences
- Division of Scientific User Facilities
- U.S. Department of Energy
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Highly stable graphitic mesoporous carbons (GMPCs) are synthesized by heat-treating polymer-templated mesoporous carbon (MPC) at 2600 degrees C. The electrochemical durability of GMPC as Pt catalyst support (Pt/GMPC) is compared with that of carbon black (Pt/XC-72). Comparisons are made using potentiostatic and cyclic voltammetric techniques on the respective specimens under conditions simulating the cathode environment of PEMFC (proton exchange membrane fuel cell). The results indicate that the Pt/GMPC is much more stable than Pt/XC-72, with 96% lower corrosion current. The Pt/GMPC also exhibits a greatly reduced loss of catalytic surface area: 14% for Pt/GMPC vs. 39% for Pt/XC-72. (C) 2008 Elsevier B.V. All rights reserved.
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