DM FC中甲醇渗透的电化学研究(英文)

游梦迪; 程璇; 刘连; 张璐

doi:10.61558/2993-074X.1713

电化学 >

2006 , Vol. 12 >Issue 2: 148 - 153

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

研究论文

DM FC中甲醇渗透的电化学研究(英文)

游梦迪 ,
程璇 ,
刘连 ,
张璐

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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

网络出版日期: 2006-05-28

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An Electrochemical Investigation of Methanol Crossover in DMFCs

YOUMeng-di ,
CHENG Xuan ,
LIULian ,
ZHANG Lu

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

Received date: 2006-05-28

Revised date: 2006-05-28

Online published: 2006-05-28

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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

本文引用格式

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, 2006 , 12(2) : 148 -153 . DOI: 10.61558/2993-074X.1713

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.

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