An Electrochemical Investigation of Methanol Crossover in DMFCs

Authors

Meng-di YOU, Department ofChemistry,;
Xuan CHENG, Department ofMaterials Science and Engineering,State Key Laboratory for Physical Chemistry ofSolid Surfaces,Xiamen University,Xiamen361005,Fujian,China;
LIULian LIULian, Department ofChemistry,;
ZHANG Lu, Department ofChemistry,;

Corresponding Author

CHENG Xuan(xcheng@xmu.edu.cn)

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

DOI Link

https://doi.org/10.61558/2993-074X.1713

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