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题名: Effect of particle size on the activity and durability of the Pt/C electrocatalyst for proton exchange membrane fuel cells
作者: Xu, Zhuang1, 2;  Zhang, Huamin1;  Zhong, Hexiang1;  Lu, Qiuhong3;  Wang, Yunfeng3;  Su, Dangsheng3, 4
关键词: Proton exchange membrane fuel cells ;  Pt/C electrocatalyst ;  Particle size ;  Activity ;  Durability
刊名: APPLIED CATALYSIS B-ENVIRONMENTAL
发表日期: 2012-01-12
DOI: 10.1016/j.apcatb.2011.10.007
卷: 111, 页:264-270
收录类别: SCI
文章类型: Article
WOS标题词: Science & Technology ;  Physical Sciences ;  Technology
类目[WOS]: Chemistry, Physical ;  Engineering, Environmental ;  Engineering, Chemical
研究领域[WOS]: Chemistry ;  Engineering
英文摘要: Carbon supported Pt (Pt/C) with various average particle sizes ranging from sub 3 nm to 6.5 nm were in situ prepared and characterized at the cathode of proton exchange membrane fuel cells (PEMFCs). A clear Pt particle size effect on both the catalytic activity for oxygen reduction reaction (ORR) and the durability of the electrocatalyst was revealed. With the Pt particle size increase, both the surface specific activity and the electrochemical stability of Pt/C improved; however, the mass specific activity of Pt/C is balanced by the electrochemical surface area loss. The reduced occupation of corner and edge atoms on the Pt surface during the Pt particle size increase is believed to weaken the adsorption of the oxygenated species on Pt, and thereafter releases more available active sites for ORR and also renders the Pt surface a stronger resistance against potential cycling. It is therefore proposed that by designing the Pt microstructure with more face atoms on the surface, cathode electrocatalyst with both improved activity and enhanced durability would be developed for PEMFCs. (C) 2011 Elsevier B.V. All rights reserved.
关键词[WOS]: PLATINUM CRYSTALLITE SIZE ;  OXYGEN REDUCTION REACTION ;  SUPPORTED PLATINUM ;  NANOPARTICLES ;  CATALYSTS ;  KINETICS ;  CARBON ;  ALLOY ;  ACID ;  DEGRADATION
语种: 英语
WOS记录号: WOS:000300528500029
Citation statistics: 
内容类型: 期刊论文
URI标识: http://cas-ir.dicp.ac.cn/handle/321008/143157
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, Div Energy Storage Batteries & Technol, Dalian 116023, Peoples R China
2.Chinese Acad Sci, Grad Sch, Beijing 100039, Peoples R China
3.Chinese Acad Sci, Inst Met Res, Shenyang Natl Lab Mat Sci, Shenyang 110016, Peoples R China
4.Max Planck Soc, Fritz Haber Inst, D-14195 Berlin, Germany

Recommended Citation:
Xu, Zhuang,Zhang, Huamin,Zhong, Hexiang,et al. Effect of particle size on the activity and durability of the Pt/C electrocatalyst for proton exchange membrane fuel cells[J]. APPLIED CATALYSIS B-ENVIRONMENTAL,2012,111:264-270.
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