期刊
SYNTHETIC METALS
卷 162, 期 24, 页码 2337-2341出版社
ELSEVIER SCIENCE SA
DOI: 10.1016/j.synthmet.2012.11.005
关键词
Catalyst support; Fuel cell; Nitrogen-doped carbon; Hierarchical; Porous materials
资金
- National Research Foundation of Korea
- Korean Government (MEST) [NRF-2010-C1AAA001-0029018]
Hierarchical porous carbons containing numerous nitrogen atoms (HPCs-N) with high surface areas and 3D interconnected open macropore structures were prepared as a catalyst support for PEMFCs. Despite the large amount of Pt nanoparticles (40 wt%) highly dispersed Pt catalysts with homogeneous small diameters (similar to 2 nm) were achieved using the effects of nitrogen sites. The electrochemical performances of a Pt-incorporated HPCs-N cathode were better than those of the Pt-incorporated carbon black cathode due to the improved carbon-catalyst binding, extension of the three-phase boundary, improved mass transfer, and a synergistic support effect with the nitrogen-doped support materials. (C) 2012 Elsevier B.V. All rights reserved.
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