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学科主题: 物理化学
题名: Iodine Ions Mediated Formation of Monomorphic Single-Crystalline Platinum Nanoflowers
作者: Yin, Jie1, 3;  Wang, Junhu1, 2;  Li, Mingrun1;  Jin, Changzi1;  Zhang, Tao1, 2
通讯作者: 王军虎 ;  张涛
关键词: Pt nanoflower ;  iodine ions mediated polyol process ;  X-ray absorption spectroscopy ;  UV-vis spectroscopy ;  Pt-I complex
刊名: CHEMISTRY OF MATERIALS
发表日期: 2012-07-24
DOI: 10.1021/cm300056h
卷: 24, 期:14, 页:2645-2654
收录类别: SCI
文章类型: Article
部门归属: 15
项目归属: 1501
产权排名: 1,1
类目[WOS]: Chemistry, Physical ;  Materials Science, Multidisciplinary
研究领域[WOS]: Chemistry ;  Materials Science
英文摘要: Well-defined and strikingly monomorphic single-crystalline Pt nanoflowers were successfully synthesized through the addition of a large amount of iodine ions into polyol process (5 mM H2PtCl6, 30 mM KI, and 50 mM PVP in ethylene glycol solution at 160 degrees C). The detailed structures of the Pt nanoflowers were studied with high-resolution TEM, indicating that high-quality production of the Pt nanoflowers could be obtained when the KI concentration was increased to six times of H2PtCl6. The size of Pt nanoflowers could be tuned by changing the concentration of H2PtCl6 with the constant Pt/I ratio (1:6). The formation process of the nanoflowers was investigated by the UV-vis and EXAFS spectroscopic studies, demonstrating that the iodine ions played a key role in inducing the formation of the single-crystalline Pt nanoflowers. After the addition of iodine ions into the polyol synthesis, the Pt-I complex was formed and reduced by different kinetics compared with that of H2PtCl6 to induce the overgrowth of Pt nanocrystals. Additionally, a small portion of iodine element was found to be strongly adsorbed on the surfaces of Pt nanoflowers, which probably also favored the anisotropic overgrowth of Pt nanocrystals resulting in the single-crystalline Pt nanoflowers. A comprehensive set of systematic studies on the synthesis factors (the concentrations of Pt precursor, iodine ions and PVP, reaction temperature, different kinds of Pt precursors and reaction atmosphere) was also reported.
关键词[WOS]: SHAPE-CONTROLLED SYNTHESIS ;  SILVER NANOPARTICLES ;  FACILE SYNTHESIS ;  METAL NANOCRYSTALS ;  AQUEOUS-SOLUTIONS ;  POLYOL SYNTHESIS ;  HALIDE-IONS ;  NANOSTRUCTURES ;  MORPHOLOGY ;  REDUCTION
语种: 英语
WOS记录号: WOS:000306674200005
Citation statistics: 
内容类型: 期刊论文
URI标识: http://cas-ir.dicp.ac.cn/handle/321008/118083
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.Chinese Acad Sci, Dalian Inst Chem Phys, Mossbauer Effect Data Ctr, Dalian 116023, Peoples R China
3.Chinese Acad Sci, Grad Univ, Beijing 100049, Peoples R China

Recommended Citation:
Yin, Jie,Wang, Junhu,Li, Mingrun,et al. Iodine Ions Mediated Formation of Monomorphic Single-Crystalline Platinum Nanoflowers[J]. CHEMISTRY OF MATERIALS,2012,24(14):2645-2654.
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