Journal
JOURNAL OF POWER SOURCES
Volume 196, Issue 4, Pages 1795-1801Publisher
ELSEVIER SCIENCE BV
DOI: 10.1016/j.jpowsour.2010.09.084
Keywords
Oxygen reduction reaction; Nitrogen doped carbon nanotubes; Proton exchang e membrane fuel cells; Rotating ring disk electrode
Funding
- Natural Sciences and Engineering Research Council of Canada (NSERC)
- Ballard Power System Inc
- Canada Foundation for Innovation (CFI)
- Ontario Research Fund (ORE)
- Ontario Early Researcher Award (ERA)
- University of Western Ontario
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Nitrogen-doped carbon nanotubes (CN(x)) were prepared via a floating catalyst chemical vapor deposition method using precursors consisting of ferrocene and melamine to control the nitrogen content Structure morphology and composition of all CN(x) catalysts were characterized by SEM TEM and XPS These results indicated that the surface nitrogen content (up to 7 7 at %) increases with the increase of melamine used Electrochemical methods were used to study the correlation between surface structure and the activity of oxygen reduction reaction (ORR) in acid and alkaline solutions Electrochemical data indicated that the higher the nitrogen content is the higher the oxygen reduction activity Especially the results from the rotating ring disk electrode technique demonstrated that CN(x) (7 7%) has similar ORR activity and selectivity with commercial Pt/C in alkaline solution (C) 2010 Elsevier B V All rights reserved
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