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题名: Preparation of highly active Pt/C cathode electrocatalysts for DMFCs by an improved aqueous impregnation method
作者: Zhou, ZH;  Wang, SL;  Zhou, WJ;  Jiang, LH;  Wang, GX;  Sun, GQ;  Zhou, B;  Xin, Q
刊名: PHYSICAL CHEMISTRY CHEMICAL PHYSICS
发表日期: 2003-12-15
DOI: 10.1039/b310721c
卷: 5, 期:24, 页:5485-5488
收录类别: SCI
文章类型: Article
部门归属: 305
项目归属: 305
产权排名: 1;1
WOS标题词: Science & Technology ;  Physical Sciences
类目[WOS]: Chemistry, Physical ;  Physics, Atomic, Molecular & Chemical
研究领域[WOS]: Chemistry ;  Physics
英文摘要: An improved aqueous impregnation method was used to prepare 40 wt% Pt/C electrocatalysts. TEM analysis of the samples showed that the Pt particles impregnated for a short time have a very narrow size distribution in the range of 1-4 nm with an average size of 2.6 nm. UV-vis spectroscopy measurements verified that the redox reaction between PtCl62- and formaldehyde took place with a slow rate at ambient temperature via a two-step reaction path, where PtCl42- serves as an intermediate. The use of the short-time-impregnated 40 wt% Pt/C as cathode electrocatalysts in direct methanol fuel cells yields better performance than that of commercial 40 wt% Pt/C electrocatalyst. Experimental evidence provides clues for the fundamental understanding of elementary steps of the redox reactions, which helps in guiding the design and preparation of highly dispersed Pt catalyst for fuel cells.
关键词[WOS]: SUPPORTED PLATINUM CATALYSTS ;  METHANOL OXIDATION ;  OXYGEN REDUCTION ;  FUEL-CELLS ;  ELECTROREDUCTION ;  CARBON ;  SIZE
语种: 英语
原文出处: 查看原文
WOS记录号: WOS:000187805500022
Citation statistics: 
内容类型: 期刊论文
URI标识: http://cas-ir.dicp.ac.cn/handle/321008/82845
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.Chinese Acad Sci, Dalian Inst Chem Phys, State Key Lab Catalysis, Dalian 116023, Peoples R China
3.Headwater NonoKinetix Inc, Lawrenceville, NJ 08648 USA

Recommended Citation:
Zhou, ZH,Wang, SL,Zhou, WJ,et al. Preparation of highly active Pt/C cathode electrocatalysts for DMFCs by an improved aqueous impregnation method[J]. PHYSICAL CHEMISTRY CHEMICAL PHYSICS,2003,5(24):5485-5488.
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