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Nanostructured Pt-Fe/C cathode catalysts for direct methanol fuel cell: The effect of catalyst composition
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
2010-03-01
DOI10.1016/j.ijhydene.2010.01.013
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
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
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.
语种英语
WOS记录号WOS:000276014400033
引用统计
被引频次:77[WOS]   [WOS记录]     [WOS相关记录]
文献类型期刊论文
条目标识符http://cas-ir.dicp.ac.cn/handle/321008/141945
专题中国科学院大连化学物理研究所
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
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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.
APA Li, Wenzhen,Xin, Qin,&Yan, Yushan.(2010).Nanostructured Pt-Fe/C cathode catalysts for direct methanol fuel cell: The effect of catalyst composition.INTERNATIONAL JOURNAL OF HYDROGEN ENERGY,35(6),2530-2538.
MLA Li, Wenzhen,et al."Nanostructured Pt-Fe/C cathode catalysts for direct methanol fuel cell: The effect of catalyst composition".INTERNATIONAL JOURNAL OF HYDROGEN ENERGY 35.6(2010):2530-2538.
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