Abstract
Methanol crossover and its effect on the open-circuit voltage(OCV) in DMFCs were studied usingcyclic voltammetry and chronoamperometry under stationary condition and at ambient temperature.An H-shapecell was constructed and a simulative DMFC test was carried out to investigate methanol crossover through Na-fion(117 from anode to cathode.The results revealed thatthe amountof methanol in the cathode side is depend-ent upon the time of penetration.As the concentration of methanol increased,the hydrogen adsorption-desorptionon the surface of electrode was suppressed and a shoulder peak appeared during the forward sweep for methanoloxidation.The simulative DMFC test also showed that the methanol crossover caused a sudden decline in theOCV.
Keywords
Methanol crossover, Methanol oxidation, Cyclic voltammetry
Publication Date
2006-05-28
Online Available Date
2006-05-28
Revised Date
2006-05-28
Received Date
2006-05-28
Recommended Citation
Meng-di YOU, Xuan CHENG, LIULian LIULian, ZHANG Lu.
An Electrochemical Investigation of Methanol Crossover in DMFCs[J]. Journal of Electrochemistry,
2006
,
12(2): 148-153.
DOI: 10.61558/2993-074X.1713
Available at:
https://jelectrochem.xmu.edu.cn/journal/vol12/iss2/5
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