应用化学

• 研究论文 • 上一篇    下一篇

以聚电解质多层膜为纳米反应器制备Au@Pt核壳纳米粒子

张信,储诚灿,黄凯华,苏朝晖*   

  1. (中国科学院长春应用化学研究所高分子物理与化学国家重点实验室 长春 130022)
  • 收稿日期:2012-09-26 修回日期:2012-10-15 出版日期:2012-12-10 发布日期:2012-12-10
  • 通讯作者: 苏朝晖,研究员; Tel:0431-85262854; Fax:0431-85262126; E-mail:zhsu@ciac.jl.cn; 研究方向:高分子表面与界面科学
  • 基金资助:
    国家自然科学基金资助项目(21174145)

Preparation of Au@Pt Core-Shell Nanoparticles Using Polyelectrolyte Multilayers as Nanoreactors

ZHANG Xin, CHU Chengcan, HUANG Kaihua, SU Zhaohui*   

  1. (State Key Laboratory of Polymer Physics and Chemistry,Changchun Institute of
    Applied Chemistry,Chinese Academy of Sciences,Changchun 130022,China)
  • Received:2012-09-26 Revised:2012-10-15 Published:2012-12-10 Online:2012-12-10

摘要: 以聚二烯丙基二甲基氯化铵和聚苯乙烯磺酸钠为构筑单元,通过静电层层自组装制备了多层膜,利用薄膜中存在的抗衡阴离子,选择AuCl-4和PtCl2-6作为Au和Pt的前驱体,通过连续的阴离子交换/还原,原位制备了Au-Pt双金属纳米粒子。 紫外-可见分光光度法、透射电子显微镜和能量色散X射线能谱数据表明,在聚电解质多层薄膜中成功地制备了具有核壳结构的Au@Pt双金属纳米粒子。 这种纳米粒子在电化学催化、燃料电池方面具有潜在的应用价值。

关键词: 聚电解质多层膜, 双金属纳米粒子, 核壳

Abstract: Polyelectrolyte multilayers were assembled via the layer-by-layer technique from poly(diallyldimethylammonium chloride)(PDDA) and poly(styrene sulfonate)(PSS). AuCl-4 and PtCl2-6, precursor ions for Au and Pt, respectively, were exchanged into the multilayers and then reduced in situ via a sequential anion exchange/reduction process to produce Au@Pt bimetallic nanoparticles in the multilayer films. The core-shell structure of the bimetallic nanoparticles produced was confirmed using ultraviolet-visible absorption spectroscopy(UV-Vis), transmission electron microscopy(TEM) and energy dispersive X-ray spectroscopy(EDX). These core-shell nanoparticles may find application in the fields of electrocatalysis and fuel cells.

Key words: polyelectrolyte multilayer, bimetallic nanoparticles, core-shell

中图分类号: