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学科主题: 物理化学
题名: Supported Pd-Cu Bimetallic Nanoparticles That Have High Activity for the Electrochemical Oxidation of Methanol
作者: Yin, Zhen1;  Zhou, Wu3;  Gao, Yongjun2;  Ma, Ding2;  Kiely, Christopher J.3;  Bao, Xinhe1
通讯作者: 马丁 ;  包信和
关键词: copper ;  electrochemistry ;  nanoparticles ;  palladium ;  supported catalysts
刊名: CHEMISTRY-A EUROPEAN JOURNAL
发表日期: 2012-04-01
DOI: 10.1002/chem.201103674
卷: 18, 期:16, 页:4887-4893
收录类别: SCI
文章类型: Article
部门归属: 5
项目归属: 502
产权排名: 1,1
WOS标题词: Science & Technology ;  Physical Sciences
类目[WOS]: Chemistry, Multidisciplinary
研究领域[WOS]: Chemistry
英文摘要: Monodisperse bimetallic PdCu nanoparticles with controllable size and composition were synthesized by a one-step multiphase ethylene glycol (EG) method. Adjusting the stoichiometric ratio of the Pd and Cu precursors afforded nanoparticles with different compositions, such as Pd85Cu15, Pd56Cu44, and Pd39Cu61. The nanoparticles were separated from the solution mixture by extraction with non-polar solvents, such as n-hexane. Monodisperse bimetallic PdCu nanoparticles with narrow size-distribution were obtained without the need for a size-selection process. Capping ligands that were bound to the surface of the particles were removed through heat treatment when the as-prepared nanoparticles were loaded onto a Vulcan XC-72 carbon support. Supported bimetallic PdCu nanoparticles showed enhanced electrocatalytic activity towards methanol oxidation compared with supported Pd nanoparticles that were fabricated according to the same EG method. For a bimetallic PdCu catalyst that contained 15?% Cu, the activity was even comparable to the state-of-the-art commercially available Pt/C catalysts. A STEM-HAADF study indicated that the formation of random solid-solution alloy structures in the bimetallic Pd85Cu15/C catalysts played a key role in improving the electrochemical activity.
关键词[WOS]: ALCOHOL FUEL-CELLS ;  FORMIC-ACID OXIDATION ;  OXYGEN REDUCTION ;  ELECTRONIC-STRUCTURE ;  ELECTROCATALYTIC PROPERTIES ;  PALLADIUM CATALYSTS ;  ALKALINE-SOLUTION ;  COPPER ;  SURFACE ;  ELECTROOXIDATION
语种: 英语
WOS记录号: WOS:000302354500014
Citation statistics: 
内容类型: 期刊论文
URI标识: http://cas-ir.dicp.ac.cn/handle/321008/118056
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, State Key Lab Catalysis, Dalian 116023, Peoples R China
2.Peking Univ, Beijing Natl Lab Mol Sci, Coll Chem & Mol Engn, Beijing 100871, Peoples R China
3.Lehigh Univ, Dept Mat Sci & Engn, Bethlehem, PA 18015 USA

Recommended Citation:
Yin, Zhen,Zhou, Wu,Gao, Yongjun,et al. Supported Pd-Cu Bimetallic Nanoparticles That Have High Activity for the Electrochemical Oxidation of Methanol[J]. CHEMISTRY-A EUROPEAN JOURNAL,2012,18(16):4887-4893.
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