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题名: Pt-based anode catalysts for direct ethanol fuel cells
作者: Zhou, WJ;  Song, SQ;  Li, WZ;  Sun, GQ;  Xin, Q;  Kontou, S;  Poulianitis, K;  Tsiakaras, P
关键词: direct ethanol fuel cells (DEFCs) ;  carbon supported PtSn catalysts ;  polymer exchange electrolyte
刊名: SOLID STATE IONICS
发表日期: 2004-11-30
DOI: 10.1016/j.ssi.2004.09.055
卷: 175, 期:1-4, 页:797-803
收录类别: ISTP ;  SCI
文章类型: Article
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, Condensed Matter
研究领域[WOS]: Chemistry ;  Physics
英文摘要: In the present work, several carbon supported PtSn and PtSnRu catalysts were prepared with different atomic ratios and tested in direct ethanol fuel cells (DEFC) operated at lower temperature (T=90 degreesC). XRD and TEM results indicate that all of these catalysts consist of uniform nano-sized particles of narrow distribution and the average particle sizes are always less than 3.0 nm. As the content of Sn increases, the Pt lattice parameter becomes longer. Single direct ethanol fuel cell tests were used to evaluate the performance of carbon supported PtSn catalysts for ethanol electro-oxidation. It was found that the addition of Sn can enhance the activity towards ethanol electro-oxidation. It is also found that a single DEFC of Pt/Sn atomic ratioless than or equal to2, "Pt1Sn1/C, Pt3Sn2/C, and Pt2Sn1/C" shows better performance than those with Pt3Sn1/C and Pt4Sn1/C. But even adopting the least active PtSn catalyst, Pt4Sn1/C, the DEFC also exhibits higher performance than that with the commercial Pt1Ru1/C, which is dominatingly used in PEMFC at present as anode catalyst for both methanol electro-oxidation and CO-tolerance. At 90 degreesC, the DEFC exhibits the best performance when Pt2Sn1/C is adopted as anode catalysts. This distinct difference in DEFC performance between the catalysts examined here is attributed to the so-called bifunctional mechanism and to the electronic interaction between Pt and Sn. It is thought that -OHads, Surface Pt active sites and the ohmic effect of PtSn/C catalyst determines the electro-oxidation activity of PtSn catalysts with different Pt/Sn ratios. (C) 2004 Elsevier B.V. All rights reserved.
关键词[WOS]: METHANOL ELECTROOXIDATION ;  MASS-SPECTROMETRY ;  OXIDATION ;  RU ;  PERFORMANCE ;  SN
语种: 英语
原文出处: 查看原文
WOS记录号: WOS:000225990500162
Citation statistics: 
内容类型: 期刊论文
URI标识: http://cas-ir.dicp.ac.cn/handle/321008/81259
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, Dalian 116023, Peoples R China
2.Univ Thessalia, Sch Engn, Dept Mech & Ind Engn, Pedion Areos 38334, Volos, Greece

Recommended Citation:
Zhou, WJ,Song, SQ,Li, WZ,et al. Pt-based anode catalysts for direct ethanol fuel cells[J]. SOLID STATE IONICS,2004,175(1-4):797-803.
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