期刊
ELECTROCHEMISTRY COMMUNICATIONS
卷 13, 期 8, 页码 879-881出版社
ELSEVIER SCIENCE INC
DOI: 10.1016/j.elecom.2011.05.027
关键词
Non-precious catalysts; Polypyrrole; Chelate; Ethylenediamine; Oxygen reduction reaction; PEM fuel cell
资金
- National Research Foundation of Korea [2009-0093823]
- Korean Ministry of Knowledge Economy [2008k01600]
- Ministry of Knowledge Economy (MKE), Republic of Korea [2008K01600] Funding Source: Korea Institute of Science & Technology Information (KISTI), National Science & Technology Information Service (NTIS)
- National Research Foundation of Korea [과C6A1905, 2009-0093823] Funding Source: Korea Institute of Science & Technology Information (KISTI), National Science & Technology Information Service (NTIS)
Nitrogen-modified carbon nanofibers to be used as catalysts in the oxygen reduction reaction (ORR) were synthesized by pyrolysis in the presence of cobalt with PPy and a chelating agent, such as ethylenediamine (ED). It has been found that the type of nitrogen source has a remarkable impact on the catalytic activity and stability of ORR catalysts. XPS and elemental analysis indicated that the combination of ED and PPy as nitrogen sources provided a synergistic effect toward increasing the total nitrogen content of the catalysts and the content of useful nitrogen functional groups such as pyridinic-N and graphitic-N that are responsible for high ORR activity and stability in acidic environments. (C) 2011 Elsevier B.V. All rights reserved.
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