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题名: The durability of polyol-synthesized PtRu/C for direct methanol fuel cells
作者: Guo, Junsong;  Sun, Gongquan;  Wu, Zhimou;  Sun, Shiguo;  Yan, Shiyou;  Cao, Lei;  Yan, Yushan;  Su, Dangsheng;  Xin, Qin
通讯作者: 孙公权
关键词: direct methanol fuel cell ;  PtRu ;  durability ;  unalloyed ru
刊名: JOURNAL OF POWER SOURCES
发表日期: 2007-10-25
DOI: 10.1016/j.jpowsour.2007.05.012
卷: 172, 期:2, 页:666-675
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: The durability of polyol-synthesized PtRu/C as anode electrocatalyst for direct methanol fuel cells (DMFCs) has been studied by conducting a 2020-h life-test of a single cell discharging at a constant current density of 100 mA cm(-2). Critical fuel cell performance parameters including anode activity, cathode activity and internal resistance are, for the first time, systematically examined at the life-test time of 556, 1093, 1630 and 2020 h. High-resolution transmission electron microscopy and X-ray diffraction (XRD) have also been performed and show that PtRu nanoparticles have agglomerated with the mean particle size increasing from 1.82 to 2.78 nm after the 2020-h life-test. Anode polarization and electrochemical impedance spectroscopy (EIS) show that there exists a stable discharging period where the anode polarization potential is less than 0.363 V versus dynamic hydrogen electrode (DHE). When the anode polarization potential exceeds 0.363 V versus DHE, the performance of the anode degrades dramatically due to the leaching of the unalloyed Ru as indicated by energy dispersive X-ray spectroscopy (EDS) and XRD. This finding provides clues in developing strategies to operate fuel cells achieving maximum lifetime without noticeable performance lose. (c) 2007 Elsevier B.V. All rights reserved.
关键词[WOS]: PERFORMANCE ;  ELECTROCATALYSTS ;  DEGRADATION ;  ANODE ;  OXIDATION ;  BLACK ;  STACK ;  DMFC
语种: 英语
原文出处: 查看原文
WOS记录号: WOS:000250654700020
Citation statistics: 
内容类型: 期刊论文
URI标识: http://cas-ir.dicp.ac.cn/handle/321008/99269
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, Direct Methanol Fuel Cell Lab, Dalian 116023, Peoples R China
2.Univ Calif Riverside, Dept Environm Chem & Engn, Riverside, CA 92521 USA
3.Max Planck Soc, Fritz Haber Inst, Dept Inorgan Chem, D-14195 Berlin, Germany

Recommended Citation:
Guo, Junsong,Sun, Gongquan,Wu, Zhimou,et al. The durability of polyol-synthesized PtRu/C for direct methanol fuel cells[J]. JOURNAL OF POWER SOURCES,2007,172(2):666-675.
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