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题名: Nano-stuctured Pt-Fe/C as cathode catalyst in direct methanol fuel cell
作者: Li, WZ;  Zhou, WJ;  Li, HQ;  Zhou, ZH;  Zhou, B;  Sun, GQ;  Xin, Q
关键词: platinum-iron alloy ;  electrocatalyst ;  cathode ;  oxygen reduction reaction (ORR) ;  direct methanol fuel cell
刊名: ELECTROCHIMICA ACTA
发表日期: 2004-03-15
DOI: 10.1016/j.electacta.2003.10.015
卷: 49, 期:7, 页:1045-1055
收录类别: SCI
文章类型: Article
WOS标题词: Science & Technology ;  Physical Sciences
类目[WOS]: Electrochemistry
研究领域[WOS]: Electrochemistry
英文摘要: Pt-Fe/C catalysts were prepared by a modified polyol synthesis method in an ethylene glycol (EG) solution, and then were heat-treated under H-2/Ar (10 vol.%) at moderate temperature (300degreesC, Pt-Fe/C300) or high temperature (900degreesC, Pt-Fe/C900). As comparison, Pt-Fe/C alloy catalyst was prepared by a two-step method (Pt-Fe/000B). X-ray diffraction (XRD) and transmission electron microscopy (TEM) images show that particles size of the catalyst increases with the increase of treatment temperatures. Pt-Fe/C300 catalyst has a mean particle size of 2.8 nm (XRD), 3.6 nm (TEM) and some Pt-Fe alloy was partly formed in this sample. Pt-Fe/C900B catalyst has the biggest particle size of 6.2 nm (XRD) and the best Pt-Fe alloy form. Cyclicvoltammetry (CV) shows that Pt-Fe/C300 has larger electrochemical surface area than other Pt-Fe/C and the highest utilization ratio of 76% among these Pt-based catalysts. Rotating disk electrode (RDE) cathodic curves show that Pt-Fe/C300 has the highest oxygen reduction reaction (ORR) mass activity (MA) and specific activity (SA), as compared with Pt/C catalyst in 1.0 M HClO4. However, Pt-Fe/C catalyst does not appears to be a more active catalyst than Pt/C for ORR in 1.0 M HClO4 + 0.1 M CH3OH. Pt-Fe/C300 exhibits higher ORR activity and better performance than other Pt-Fe/C or Pt/C catalysts when employed for cathode in direct methanol single cell test, the enhancement of the cell performance is logically attributed to its higher ORR activity, which is probably attributed to more Pt-0 species existing and Fe ion corrosion from the catalyst. (C) 2003 Elsevier Ltd. All rights reserved.
关键词[WOS]: OXYGEN-REDUCTION CATALYSTS ;  TRANSITION-METAL SULFIDES ;  CARBON-SUPPORTED PLATINUM ;  PHOSPHORIC-ACID ;  PARTICLE-SIZE ;  ALLOYS ;  ELECTROREDUCTION ;  ELECTROCATALYSTS ;  CO ;  OXIDATION
语种: 英语
WOS记录号: WOS:000189226100005
Citation statistics: 
内容类型: 期刊论文
URI标识: http://cas-ir.dicp.ac.cn/handle/321008/139463
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.Headwaters Nano Kinetix, Lawrenceville, NJ 08648 USA
3.Chinese Acad Sci, Dalian Inst Chem Phys, State Key Lab Catalysis, Dalian 116023, Peoples R China

Recommended Citation:
Li, WZ,Zhou, WJ,Li, HQ,et al. Nano-stuctured Pt-Fe/C as cathode catalyst in direct methanol fuel cell[J]. ELECTROCHIMICA ACTA,2004,49(7):1045-1055.
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