...
  • 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>Materials Chemistry and Physics >Structure determination of chitosan-stabilized Pt and Pd based bimetallic nanoparticles by X-ray photoelectron spectroscopy and transmission electron microscopy
【24h】

Structure determination of chitosan-stabilized Pt and Pd based bimetallic nanoparticles by X-ray photoelectron spectroscopy and transmission electron microscopy

机译：X射线光电子能谱和透射电子显微镜确定壳聚糖稳定的Pt和Pd基双金属纳米颗粒的结构

获取原文
获取原文并翻译 | 示例
           
页面导航
  • 摘要
  • 著录项
  • 相似文献
  • 相关主题

摘要

Chitosan (CTS)-stabilized bimetallic nanoparticles were prepared at room temperature (it.) in aqueous solution. Palladium (Pd) and platinum (Pt) were selected as the first metals while iron (Fe) and nickel (Ni) functioned as the second metals. In order to obtain the noble metal core-transition metal shell structures, bimetallic nanoparticles were prepared in a two-step process: the preparation of mono noble metallic (Pd or Pt) nanoparticles and the deposition of transition metals (Fe or Ni) on the surface of the monometallic nanoparticles. The structures of the nanoparticles were studied using X-ray photoelectron spectroscopy (XPS)-and transmission electron microscopy (TEM). The XPS results show that Pd and Pt exist mainly in zero valences. The presence of Fe and Ni in the bimetallic nanoparticles affects the binding energy of Pd and Pt. Moreover, the studies of 0 Is spectra indicate the presence of Fe or Ni shells. The analyses of TEM micrographs give the particle size and size distributions while the high-resolution TEM (HRTEM) micrographs show the existence of noble metal core lattices. The results confirm the formation of noble metal core-transition metal shell structures.
机译：在室温（水溶液）中于水溶液中制备壳聚糖（CTS）稳定的双金属纳米颗粒。选择钯（Pd）和铂（Pt）作为第一金属，而铁（Fe）和镍（Ni）充当第二金属。为了获得贵金属的核-过渡金属壳结构，双金属纳米颗粒的制备分两步进行：制备单贵金属（Pd或Pt）纳米颗粒，并在其上沉积过渡金属（Fe或Ni）。单金属纳米颗粒的表面。使用X射线光电子能谱（XPS）和透射电子显微镜（TEM）研究了纳米颗粒的结构。 XPS结果表明，Pd和Pt主要以零价存在。双金属纳米颗粒中Fe和Ni的存在会影响Pd和Pt的结合能。此外，对0 Is光谱的研究表明存在Fe或Ni壳。 TEM显微照片的分析给出了粒径和尺寸分布，而高分辨率TEM（HRTEM）显微照片显示了贵金属核晶格的存在。结果证实了贵金属核-过渡金属壳结构的形成。

著录项

  • 来源
    《Materials Chemistry and Physics》 |2013年第2期|493-498|共6页
  • 作者

    Lihua Wu; Salimah Shafii; Mohd Ridzuan Nordin; Kong Yong Liew; Jinlin Li;

  • 作者单位

    Faculty of Industrial Science and Technology, Universiti Malaysia Pahang 26300 Kuantan, Pahang, Malaysia;

    Faculty of Industrial Science and Technology, Universiti Malaysia Pahang 26300 Kuantan, Pahang, Malaysia;

    Faculty of Industrial Science and Technology, Universiti Malaysia Pahang 26300 Kuantan, Pahang, Malaysia;

    Faculty of Industrial Science and Technology, Universiti Malaysia Pahang 26300 Kuantan, Pahang, Malaysia;

    Key Laboratory of Catalysis and Materials Science of the State Ethnic Affairs Commission & Ministry of Education, Hubei Province, South-Central University for Nationalities, 430074 Wuhan, China;

  • 收录信息 美国《科学引文索引》(SCI);美国《工程索引》(EI);美国《生物学医学文摘》(MEDLINE);
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

    Nanostructures; Metals; X-ray photo-emission spectroscopy (XPS); Electron microscopy (STEM, TEM and SEM); Oxidation;

    机译：纳米结构;金属;X射线发射光谱（XPS）;电子显微镜（STEM;TEM和SEM）;氧化作用;

相似文献

  • 外文文献
  • 中文文献
  • 专利
获取原文

客服邮箱：kefu@zhangqiaokeyan.com

京公网安备：11010802029741号 ICP备案号：京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有

  • 客服微信

  • 服务号