期刊
JOURNAL OF POWER SOURCES
卷 181, 期 1, 页码 74-78出版社
ELSEVIER
DOI: 10.1016/j.jpowsour.2008.02.095
关键词
methanol tolerance; chelate; direct methanol fuel cell; oxygen reduction reaction; electrocatalyst; power density
资金
- Korea Institute of Industrial Technology(KITECH) [2006-N-CT-IM-E-01-0000] Funding Source: Korea Institute of Science & Technology Information (KISTI), National Science & Technology Information Service (NTIS)
- National Research Foundation of Korea [과C6A1905] Funding Source: Korea Institute of Science & Technology Information (KISTI), National Science & Technology Information Service (NTIS)
Platinum nitride supported on carbon (PtNx/C) is synthesized by the novel strategy of chelating the Pt precursor followed by pyrolysis and is characterized as a possible cathode electrocatalyst for direct methanol fuel cells (DMFCs). The prepared PtNx/C is shown to possess high methanol tolerance and catalytic activity for the oxygen reduction reaction (ORR). The results indicate that the temperature of the heat treatment and the molar ratio of Pt to N in the precursor solution play important roles in the catalytic performance. A sample of PtNx/C prepared at 700 degrees C with a Pt:N ratio of 1:2 shows a significant decrease in the potential loss associated with the mixed potential and the poisoning effect by adsorbed methanol, and this results in a high power density of 180 MW cm(-2). The performance is 30% higher than that of Pt/C under 4 M of methanol concentration. (C) 2008 Elsevier B.V. All rights reserved. (C) 2008 Elsevier B.V. All rights reserved.
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