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题名: Nanostructured Pt-Fe/C cathode catalysts for direct methanol fuel cell: The effect of catalyst composition
作者: Li, Wenzhen1;  Xin, Qin2;  Yan, Yushan3, 4
关键词: Platinum-iron alloy ;  Electrocatalyst ;  Cathode ;  Oxygen reduction reaction ;  Direct methanol fuel cell
刊名: INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
发表日期: 2010-03-01
DOI: 10.1016/j.ijhydene.2010.01.013
卷: 35, 期:6, 页:2530-2538
收录类别: SCI
文章类型: Article
WOS标题词: Science & Technology ;  Physical Sciences ;  Technology
类目[WOS]: Chemistry, Physical ;  Electrochemistry ;  Energy & Fuels
研究领域[WOS]: Chemistry ;  Electrochemistry ;  Energy & Fuels
英文摘要: A series of carbon supported Pt-Fe bimetallic nanocatalysts (Pt-Fe/C) with varying Pt:Fe ratio were prepared by a modified ethylene glycol (EG) method, and then heat-treated under H(2)-Ar (10 vol%-H(2)) atmosphere at 900 degrees C. The Pt-Fe/C catalysts were characterized by X-ray diffraction (XRD), transmission electron spectroscopy (TEM), energy dispersive analysis by X-rays (EDX) and induced coupled plasma-atomic emission spectroscopy (ICP-AES). XRD analysis shows that Pt-Fe/C catalysts have small crystalline particles and form better Pt-Fe alloy structure with Fe amount increasing. TEM images evidence that small Pt-Fe nanoparticles homogeneously deposited on carbon support and addition of Fe can effectively prevent Pt particles agglomeration. EDX and ICP-AES show that Fe precursor cannot be fully reduced and deposited on carbon support through the adopted EG reduction approach. The electrochemical surface area of Pt-Fe/C catalyst obtained through hydrogen desorption areas in the CV curve increases with Fe atomic percentage increasing from 0 to ca. 50%, and then decreases with more Fe in the Pt-Fe/C catalyst. RDE tests show that the Pt-Fe/C with a Pt:Fe ratio of 1.2:1 and an optimized lattice parameter of around 3.894 angstrom has the highest mass activity and specific activity to oxygen reduction reaction (ORR). As cathode catalyst, this Pt-Fe/C (Pt:Fe ratio of 1.2:1) exhibits higher direct methanol fuel cell performance at 90 degrees C than Pt/C and other Pt-Fe/C catalysts, this could be attributed to its smaller particle size and better Pt-Fe alloy structure. (C) 2010 Professor T. Nejat Veziroglu. Published by Elsevier Ltd. All rights reserved.
关键词[WOS]: OXYGEN-REDUCTION CATALYSTS ;  TRANSITION-METAL SULFIDES ;  SUPPORTED PLATINUM ;  CARBON NANOTUBES ;  ANODE CATALYSTS ;  PARTICLE-SIZE ;  ALLOY NANOPARTICLES ;  FEPT NANOPARTICLES ;  PHOSPHORIC-ACID ;  ELECTROCATALYSTS
语种: 英语
WOS记录号: WOS:000276014400033
Citation statistics: 
内容类型: 期刊论文
URI标识: http://cas-ir.dicp.ac.cn/handle/321008/141945
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.Michigan Technol Univ, Dept Chem Engn, Houghton, MI 49931 USA
2.Chinese Acad Sci, Dalian Inst Chem Phys, State Key Lab Catalysis, Dalian 116023, Peoples R China
3.Univ Calif Riverside, Dept Chem & Environm Engn, Ctr Environm Res & Technol CE CERT, Riverside, CA 92521 USA
4.Univ Calif Riverside, Coll Engn, Ctr Environm Res & Technol CE CERT, Riverside, CA 92521 USA

Recommended Citation:
Li, Wenzhen,Xin, Qin,Yan, Yushan. Nanostructured Pt-Fe/C cathode catalysts for direct methanol fuel cell: The effect of catalyst composition[J]. INTERNATIONAL JOURNAL OF HYDROGEN ENERGY,2010,35(6):2530-2538.
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