Journal
APPLIED SURFACE SCIENCE
Volume 256, Issue 1, Pages 335-341Publisher
ELSEVIER SCIENCE BV
DOI: 10.1016/j.apsusc.2009.08.027
Keywords
First-principles; Density-functional theory; Ab initio; Oxygen reduction; Fuel cell; Cathode; Carbon; Nitrogen
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Funding
- Ministry of Education, Culture, Sports, Science and Technology (MEXT) of Japan
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Density-functional calculations were performed to examine oxygen reduction reactions (ORRs) on N-doped graphene sheets. We found that O-2 adsorption becomes energetically favorable as the number of N around a C=C bond increases. Pathways for both 4e and 2e reductions were identified. The possibility of O poisoning was suggested after calculating the reversible potential of each reduction step. (C) 2009 Elsevier B.V. All rights reserved.
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