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题名: Structure of PtnNi Nanoparticles Electrocatalysts Investigated by X-ray Absorption Spectroscopy
作者: Bao, Hongliang1, 2;  Li, Jiong1;  Jiang, Luhua3;  Shang, Mingfeng1;  Zhang, Shuo1;  Jiang, Zheng1;  Wei, Xiangjun1;  Huang, Yuying1, 2;  Sun, Gongquan3;  Wang, Jian-Qiang1, 2
刊名: JOURNAL OF PHYSICAL CHEMISTRY C
发表日期: 2013-10-10
DOI: 10.1021/jp404799d
卷: 117, 期:40, 页:20584-20591
收录类别: SCI
文章类型: Article
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: Carbon supported Pt-Ni nanoparticles (NPs) electrocatalysts with nominal Pt/Ni atomic ratios of 3:1, 2:1, and 1:1, denoted as Pt3Ni/C, Pt2Ni/C, and Pt1Ni/C, respectively, were obtained by a modified polyol process. The structure of PtnNi/C (n = 3, 2, I) electrocatalysts was studied by using an X-ray absorption spectroscopy technique combined with X-ray diffraction and transmission electron microscopy. Significantly, the NPs of Pt3Ni/C in air are demonstrated to have a quasi core-shell structure consisting of a core of metallic Pt surrounded by many small NiOx clusters. In contrast, both Pt2Ni/C and Pt1Ni/C are demonstrated to have an alloy structure with partial oxidation on the surface. Under the atmosphere of H-2 at 393 K, the PtnNi/C became the expected bimetallic alloy. At last, we discuss the effect of Ni amount on the structure of PtnNi/C and estimate their possible catalytic activity for methanol oxidation reaction. Our results further confirmed that the structure of Pt-Ni NPs can be influenced by Ni amount and this effect may be enlarged by environment effects.
关键词[WOS]: METHANOL OXIDATION REACTION ;  OXYGEN REDUCTION REACTION ;  PT-NI ;  BIMETALLIC NANOPARTICLES ;  FUEL-CELLS ;  PTXNI1-X NANOPARTICLES ;  SUPPORTED CATALYSTS ;  ALLOY NANOPARTICLES ;  SURFACE-PROPERTIES ;  PLATINUM ALLOYS
语种: 英语
WOS记录号: WOS:000326366800025
Citation statistics: 
内容类型: 期刊论文
URI标识: http://cas-ir.dicp.ac.cn/handle/321008/137762
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, Shanghai Inst Appl Phys, Shanghai Synchrotron Radiat Facil, Shanghai 201204, Peoples R China
2.Chinese Acad Sci, Shanghai Inst Appl Phys, Key Lab Interfacial Phys & Technol, Shanghai 201204, Peoples R China
3.Chinese Acad Sci, Dalian Inst Chem Phys, Dalian Natl Lab Clean Energy, Div Fuel Cell & Battery, Dalian 116023, Peoples R China

Recommended Citation:
Bao, Hongliang,Li, Jiong,Jiang, Luhua,et al. Structure of PtnNi Nanoparticles Electrocatalysts Investigated by X-ray Absorption Spectroscopy[J]. JOURNAL OF PHYSICAL CHEMISTRY C,2013,117(40):20584-20591.
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