Graphitic mesoporous carbon as a durable fuel cell catalyst support
2008; Elsevier BV; Volume: 185; Issue: 1 Linguagem: Inglês
10.1016/j.jpowsour.2008.06.041
ISSN1873-2755
AutoresPaul V. Shanahan, Lianbin Xu, Chengdu Liang, Mahesh Waje, Sheng Dai, Yushan Yan,
Tópico(s)Electrocatalysts for Energy Conversion
ResumoHighly stable graphitic mesoporous carbons (GMPCs) are synthesized by heat-treating polymer-templated mesoporous carbon (MPC) at 2600 °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.
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