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题名: PtTiOx/OC electrocatalysts with improved durability in H-2/O-2 PEMFCs without external humidification
作者: Tian, Juan1, 2;  Sun, Gongquan1;  Cai, Mei3;  Mao, Qing1, 2;  Xin, Qin1, 4
刊名: JOURNAL OF THE ELECTROCHEMICAL SOCIETY
发表日期: 2008
DOI: 10.1149/1.2816290
卷: 155, 期:2, 页:B187-B193
收录类别: SCI
文章类型: Article
WOS标题词: Science & Technology ;  Physical Sciences ;  Technology
类目[WOS]: Electrochemistry ;  Materials Science, Coatings & Films
研究领域[WOS]: Electrochemistry ;  Materials Science
英文摘要: In the present investigation, PtTiOx/C-500-Ar electrocatalyst with excellent durability and the ability of water retention was prepared and characterized. Through transmission electron microscopy, PtTiOx/C-500-Ar electrocatalyst was observed to exhibit good particle size preservation during thermal treatment and durability testing. The combined results from single cell durability testing, scanning electron microscopy, electrochemical surface area of the electrocatalyst, and tests designed to inspect the variation of internal resistance, as well as performance of the fuel cell, demonstrated that fuel cell performance degradation was mainly caused by the increase of fuel cell internal resistance due to the hydrophilicity change of the membrane and the loss of electrochemical surface area in cathode electrocatalyst. The results also indicated that by using PtTiOx/C-500-Ar as both cathode and anode electrocatalysts, the single cell could be stably operated with dry gases without any external humidification. The PtTiOx/C-500-Ar electrocatalyst exhibited excellent durability during 518 h testing. These results imply that titanium oxide plays an important role in increasing the uptake of water and serving as an anchor for the adjacent platinum particles to prevent Pt particles from agglomeration and coalescence during the thermal treatment and durability testing. (c) 2007 The Electrochemical Society.
关键词[WOS]: POLYMER ELECTROLYTE MEMBRANES ;  FUEL-CELLS ;  PLATINUM DISSOLUTION ;  WATER MANAGEMENT ;  ANODE CATALYSTS ;  DEGRADATION ;  SUPPORT ;  TIO2 ;  THIN ;  PERFORMANCE
语种: 英语
WOS记录号: WOS:000251906800025
Citation statistics: 
内容类型: 期刊论文
URI标识: http://cas-ir.dicp.ac.cn/handle/321008/141029
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 Alcohol Fuel Cell Lab, Dalian 116023, Peoples R China
2.Chinese Acad Sci, Grad Sch, Beijing 100039, Peoples R China
3.Gen Motors Res & Dev Ctr, Warren, MI 48090 USA
4.Chinese Acad Sci, Dalian Inst Chem Phys, State Key Lab Catalysis, Dalian 116023, Peoples R China

Recommended Citation:
Tian, Juan,Sun, Gongquan,Cai, Mei,et al. PtTiOx/OC electrocatalysts with improved durability in H-2/O-2 PEMFCs without external humidification[J]. JOURNAL OF THE ELECTROCHEMICAL SOCIETY,2008,155(2):B187-B193.
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