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题名: A methanol concentration sensor using twin membrane electrode assemblies operated in pulsed mode for DMFC
作者: Sun, Wei;  Sun, Gongquan;  Yang, Weiqian;  Yang, Shaohua;  Xin, Qin
通讯作者: 孙公权
关键词: direct methanol fuel cell ;  sensor ;  methanol concentration ;  membrane electrode assembly (MEA) ;  pulsed amperometric detection
刊名: JOURNAL OF POWER SOURCES
发表日期: 2006-11-22
DOI: 10.1016/j.jpowsour.2006.07.033
卷: 162, 期:2, 页:1115-1121
收录类别: SCI
文章类型: Article
部门归属: 3
项目归属: 305
产权排名: 1;1
WOS标题词: Science & Technology ;  Physical Sciences ;  Technology
类目[WOS]: Electrochemistry ;  Energy & Fuels
研究领域[WOS]: Electrochemistry ;  Energy & Fuels
英文摘要: A methanol concentration sensor based on twin Nation membrane electrode assemblies (MEAs) was constructed and characterized by electrochemical methods. Pulsed amperometric detection (PAD) method, using a low frequency (67 mHz) potential waveform of E(red) (cathodic activation potential)= -0.2 V, E(pre-oxd) (anodic pre-oxidation potential) = +0.60 V and E(det) (detection potential) = +0.80 V versus DHE with the same pulse width of 5 s was applied to the sensor to enhance its performance. The response in pulsed mode had better linearity over a wider concentration range than that in potentiostatic mode. Furthermore, using this PAD method, the stability of the sensor was enhanced significantly with a slightly linear degradation rate of 2.9 mA h(-1) during long-time test. The performances of the sensor in terms of linearity, low anodic saturation and high stability show its potential application for direct methanol fuel cells. (c) 2006 Elsevier B.V. All rights reserved.
关键词[WOS]: POTENTIAL WAVE-FORM ;  FUEL-CELL ;  AMPEROMETRIC DETECTION ;  ELECTROOSMOTIC DRAG ;  NAFION MEMBRANES ;  ELECTROOXIDATION ;  NANOPARTICLES ;  IMPEDANCE ;  OXIDATION ;  DESIGN
语种: 英语
原文出处: 查看原文
WOS记录号: WOS:000242821500056
Citation statistics: 
内容类型: 期刊论文
URI标识: http://cas-ir.dicp.ac.cn/handle/321008/98299
Appears in Collections:中国科学院大连化学物理研究所_期刊论文

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作者单位: 1.Chinese Acad Sci, Dalian Inst Chem Phys, Dalian 116023, Peoples R China
2.Chinese Acad Sci, Grad Sch, Beijing 100864, Peoples R China

Recommended Citation:
Sun, Wei,Sun, Gongquan,Yang, Weiqian,et al. A methanol concentration sensor using twin membrane electrode assemblies operated in pulsed mode for DMFC[J]. JOURNAL OF POWER SOURCES,2006,162(2):1115-1121.
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