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题名: Ethanol oxidation on novel, carbon supported Pt alloy catalysts - Model studies under defined diffusion conditions
作者: Colmenares, L.;  Wang, H.;  Jusys, Z.;  Jiang, L.;  Yan, S.;  Sun, G. Q.;  Behm, R. J.
关键词: electrocatalysis ;  bimetallic catalyst ;  ethanol oxidation ;  activity ;  selectivity ;  Pt/C ;  PtRu/C ;  Pt3Sn/C ;  TEM ;  XRD ;  EDX ;  DEMS ;  RDE
刊名: ELECTROCHIMICA ACTA
发表日期: 2006-10-05
DOI: 10.1016/j.electacta.2006.04.063
卷: 52, 期:1, 页:221-233
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: The structure, surface composition and activity/selectivity for ethanol oxidation of carbon supported Pt alloy catalysts with different composition and catalyst loading, which were synthesized via the polyol-route, were investigated and characterized by microscopic/spectroscopic methods (TEM, EDX, XRD) and electrochemical (RDE, on-line DEMS) measurements under well-defined transport and diffusion conditions. The performance of the polyol-type Pt/C (20 wt.%), PtRu/C (20, 40 and 60 wt.%), and Pt3Sn/C (20 wt.%) catalysts was compared with that of commercial Pt/C, PtRu/C and Pt3Sn/C (E-Tek) catalysts. The metal particle sizes of the polyol-type catalysts are significantly smaller than those of the corresponding commercial catalysts, nevertheless both the mass specific activities and, more pronounced, the inherent, active surface area specific activities are lower than those of the commercial catalysts, which is related to the lower degree of alloy formation in the polyol-type catalysts. For all catalysts, incomplete ethanol oxidation to C2 products (acetaldehyde and acetic acid) prevails under conditions of this study, CO2 formation contributes by <= 1% for potentiostatic reaction conditions. The lower activity of the polyol-type catalysts is mainly due to the lower activity for acetaldehyde formation. Implications and further strategies for fuel cell applications are discussed. (c) 2006 Elsevier Ltd. All rights reserved.
关键词[WOS]: METHANOL FUEL-CELL ;  ELECTROCHEMICAL MASS-SPECTROMETRY ;  ANODE CATALYSTS ;  PLATINUM-ELECTRODE ;  PT3SN CATALYSTS ;  FORMIC-ACID ;  PT-RU ;  ELECTROOXIDATION ;  ELECTROCATALYSTS ;  CO
语种: 英语
WOS记录号: WOS:000241253100028
Citation statistics: 
内容类型: 期刊论文
URI标识: http://cas-ir.dicp.ac.cn/handle/321008/140308
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 Ulm, Dept Surface Chem & Catalysis, D-89069 Ulm, Germany

Recommended Citation:
Colmenares, L.,Wang, H.,Jusys, Z.,et al. Ethanol oxidation on novel, carbon supported Pt alloy catalysts - Model studies under defined diffusion conditions[J]. ELECTROCHIMICA ACTA,2006,52(1):221-233.
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