DM FC中甲醇渗透的电化学研究(英文)

电化学（中英文） ›› 2006, Vol. 12 ›› Issue (2): 148-153.

DM FC中甲醇渗透的电化学研究(英文)

游梦迪;程璇;刘连;张璐;

厦门大学化学系,厦门大学材料科学与工程系固体表面物理化学国家重点实验室,厦门大学化学系,厦门大学化学系福建厦门361005

收稿日期:2006-05-28 修回日期:2006-05-28 出版日期:2006-05-28 发布日期:2006-05-28

An Electrochemical Investigation of Methanol Crossover in DMFCs

YOUMeng-di1,CHENG Xuan*2,LIULian1,ZHANG Lu1

(1.Department ofChemistry,2.Department ofMaterials Science and Engineering,State Key Laboratory for Physical Chemistry ofSolid Surfaces,Xiamen University,Xiamen361005,Fujian,China

Received:2006-05-28 Revised:2006-05-28 Published:2006-05-28 Online:2006-05-28

摘要/Abstract

摘要： 设计并建立甲醇渗透测试体系和模拟直接甲醇燃料电池(DMFC)运行体系,分别考察静态条件下H-cell中甲醇的渗透和运行条件下甲醇渗透对OCV的影响.循环伏安和计时电流法测试表明:随着渗透时间的延长,阴极侧的甲醇浓度增加;甲醇浓度增加,氧化峰电流增大,峰电位正移,氢在电极表面的吸脱附受到抑制,同时甲醇的正向氧化电流曲线出现肩峰.模拟DMFC实验测试结果表明:OCV先逐渐上升,接着发生突降,大约1.5 h后趋于稳定.

关键词: 甲醇渗透, 甲醇氧化, 循环伏安, 计时电流

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.

Key words: Methanol crossover, Methanol oxidation, Cyclic voltammetry

中图分类号:

O621.25
O646

游梦迪;程璇;刘连;张璐;. DM FC中甲醇渗透的电化学研究(英文)[J]. 电化学（中英文）, 2006, 12(2): 148-153.

YOUMeng-di1,CHENG Xuan*2,LIULian1,ZHANG Lu1. An Electrochemical Investigation of Methanol Crossover in DMFCs[J]. Journal of Electrochemistry, 2006, 12(2): 148-153.

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链接本文: https://electrochem.xmu.edu.cn/CN/

https://electrochem.xmu.edu.cn/CN/Y2006/V12/I2/148

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