Corrosion resistance and sintering effect of carbon supports in polymer electrolyte membrane fuel cells
- Corrosion resistance and sintering effect of carbon supports in polymer electrolyte membrane fuel cells
- 오형석; 임희은; 노범욱; 황인철; 김한성
- Carbon nanocage; Carbon corrosion; Mass spectrometry; PEM fuel cell
- Issue Date
- Electrochimica acta
- VOL 54, NO 2-6521
- The corrosion resistance of carbon black, carbon nanofiber and carbon nanocage used as catalyst supports in fuel cells was investigated by monitoring CO2 emission using on-line mass spectrometry when 1.4 V was applied for 30 min. The changes associated with the carbon corrosion were assessed through electrochemical methods. In general, graphitized carbon supports were more corrosion-resistant than amorphous carbon black. However, the degree of graphitization did not directly correlate with higher resistance to corrosion. Hydrophobicity was critical in enhancing resistance to corrosion. When sintering of Pt particles was considered, carbon nanocages were more resistant than nanofibers. The present findings thus indicate that the carbon nanocage is an appropriate catalyst support in fuel cell systems.
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