期刊
JOURNAL OF POWER SOURCES
卷 195, 期 9, 页码 2623-2627出版社
ELSEVIER SCIENCE BV
DOI: 10.1016/j.jpowsour.2009.11.071
关键词
Carbon nanofiber; Durability; Heat-treatment temperature; Carbon corrosion; Polymer electrolyte membrane fuel cell
资金
- Ministry of Knowledge Economy of Korea [2009T100100606]
- National Research Foundation of Korea [NRF-2009-0092926]
- Korean Government (MEST)
- Korea Evaluation Institute of Industrial Technology (KEIT) [20093021030021, 2005-N-CT-HM-E-01-0000] Funding Source: Korea Institute of Science & Technology Information (KISTI), National Science & Technology Information Service (NTIS)
- National Research Foundation of Korea [2009-0092930] Funding Source: Korea Institute of Science & Technology Information (KISTI), National Science & Technology Information Service (NTIS)
This study examines the effect of heat-treatment temperature on the electrochemical corrosion of carbon nanofibers (CNFs) in polymer electrolyte membrane (PEM) fuel cells. Corrosion is investigated by monitoring the generation of CO2 using an on-line mass spectrometer at a constant potential of 1.4V for 30 min. The experimental results show that the generation of CO2 decreases with increasing heat-treatment temperature, indicating that less electrochemical carbon corrosion occurs. In particular, when the heat-treatment temperature is 2400 degrees C, the change intensifies. X-ray photoelectron spectroscopic analysis shows that oxygen functional groups on the carbon surface decrease with increasing heat-treatment temperature. A reduction in oxygen functional groups increases the hydrophobic nature of the carbon surface, which is responsible for the increased corrosion resistance of CNFs. (C) 2009 Elsevier B.V. All rights reserved.
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