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题名: Design and preparation of highly active Pt-Pd/C catalyst for the oxygen reduction reaction
作者: Li, Huanqiao;  Sun, Gongquan;  Li, Na;  Sun, Shiguo;  Su, Dangsheng;  Xin, Qin
通讯作者: 孙公权
刊名: JOURNAL OF PHYSICAL CHEMISTRY C
发表日期: 2007-04-19
DOI: 10.1021/jp067755y
卷: 111, 期:15, 页:5605-5617
收录类别: SCI
文章类型: Article
部门归属: 3
项目归属: 305
产权排名: 1;1
WOS标题词: Science & Technology ;  Physical Sciences ;  Technology
类目[WOS]: Chemistry, Physical ;  Nanoscience & Nanotechnology ;  Materials Science, Multidisciplinary
研究领域[WOS]: Chemistry ;  Science & Technology - Other Topics ;  Materials Science
英文摘要: ORR (Oxygen Reduction Reaction) has been studied on Pt-Pd/C catalyst both experimentally and theoretically to gain insight into the promotion effect of PtPd nanoclusters to ORR and to provide guidelines for the design of an improved ORR catalyst. First, Pt3Pd1/C, Pt1Pd1/C, and Pt/C catalysts were prepared by the polyol process in ethylene glycol solution and characterized by XRD (X-ray diffraction), TEM ( transmission electron microscope), and CV ( cyclic voltammetry) techniques. XRD patterns reveal that all the catalysts have disordered face-centered cubic structures similar to the commercial Pt/C catalyst. Low-resolution TEM images indicate that the dispersion of the metal nanoparticles on the carbon support is uniform and in a narrow particle size range for Pt3Pd1/C and Pt/C catalysts, while for Pt1Pd1/C catalyst, the dispersion of the metal nanoparticles on the carbon support is uneven with a little agglomeration. Point resolved EDS ( energy dispersive X-ray spectroscopy) of the individual particles have shown that both Pt and Pd are represented in the single nanoparticle for the Pt-Pd/C catalysts. CV tests show that Pd-containing catalysts of Pt3Pd1/C and Pt1Pd1/C have different features in the hydrogen adsorption-desorption region from pure Pt/C catalyst. The catalytic activity of Pt3Pd1/C for ORR is a little improved compared with Pt/C or Pt1Pd1/C catalyst in RDE ( rotating disk electrode) measurement. Detailed work reveals that the activity of ORR could be further improved on Pt-Pd/C catalyst with Pt rich on the metal nanoparticles surface. This point is consistent with the theoretical calculation results. DFT ( Density Function Theory) studies on the adsorption and dissociation of O-2 on PtPd cluster indicate that the presence of Pd atoms facilitates the dissociation of O-2 on Pt sites.
关键词[WOS]: EFFECTIVE CORE POTENTIALS ;  METHANOL FUEL-CELL ;  FORMIC-ACID ;  MOLECULAR CALCULATIONS ;  CATHODE CATALYST ;  PHOSPHORIC-ACID ;  O-2 REDUCTION ;  PARTICLE-SIZE ;  ALLOYS ;  PLATINUM
语种: 英语
原文出处: 查看原文
WOS记录号: WOS:000245635500010
Citation statistics: 
内容类型: 期刊论文
URI标识: http://cas-ir.dicp.ac.cn/handle/321008/99271
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, Direct Alcohol Fuel Cell Lab, Dalian 116023, Peoples R China
2.Chinese Acad Sci, Grad Sch, Beijing 100039, Peoples R China
3.Chinese Acad Sci, Dalian Inst Chem Phys, Lab Fuel Cell, Dalian 116023, Peoples R China
4.Liaoning Normal Univ, Coll Chem & Chem Engn, Dalian 116029, Peoples R China
5.ELCASS, Fritz Haber Inst Max Planck Soc, Dept Inorgan Chem, D-14195 Berlin, Germany
6.Chinese Acad Sci, Dalian Inst Chem Phys, State Key Lab Catalysis, Dalian 116023, Peoples R China

Recommended Citation:
Li, Huanqiao,Sun, Gongquan,Li, Na,et al. Design and preparation of highly active Pt-Pd/C catalyst for the oxygen reduction reaction[J]. JOURNAL OF PHYSICAL CHEMISTRY C,2007,111(15):5605-5617.
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