物理化学学报 >> 2006, Vol. 22 >> Issue (08): 1015-1020.doi: 10.3866/PKU.WHXB20060821

研究论文 上一篇    下一篇

Au-Pt双金属纳米颗粒在玻碳电极上的自组装

于志辉;田 密;焦庆影;夏定国   

  1. 北京工业大学环境与能源工程学院, 北京 100022
  • 收稿日期:2005-12-15 修回日期:2006-04-27 发布日期:2006-08-04
  • 通讯作者: 夏定国 E-mail:dgxia@bjut.edu.cn

Self-assembling Nanobimetallic Particles of Au-Pt on Glassy Carbon Electrode

YU Zhi- Hui;TIAN Mi;JIAO Qing-Ying;XIA Ding- Guo   

  1. College of Environmental and Energy Engineering, Beijng University of Technology, Bejing 100022, P. R. China
  • Received:2005-12-15 Revised:2006-04-27 Published:2006-08-04
  • Contact: XIA Ding-Guo E-mail:dgxia@bjut.edu.cn

摘要: 利用硼氢化钠还原HAuCl4和H2PtCl4的混合溶液, 制备了Au- Pt双金属纳米颗粒. UV- Vis、TEM、ED、XRD、XPS等研究结果表明双金属纳米颗粒为Au- Pt合金. 在玻碳电极上通过有机偶联层半胱氨酸进行了Au- Pt双金属纳米颗粒的自组装, 得到Au- Pt/半胱氨酸/玻碳电极, 并通过SEM对其表面结构进行了表征, 粒子的平均粒径为12.6 nm. 用循环伏安法对Au- Pt/半胱氨酸/玻碳电极的电化学性能进行了测试. 结果表明Au- Pt/半胱氨酸/玻碳电极具有良好的电催化甲醇氧化性能.

关键词: 双金属纳米颗粒, Au-Pt, 自组装

Abstract: Nanobimetallic particles of Au-Pt alloy were synthesized by reducing HAuCl4 and H2PtCl4 mixture solution with NaBH4. UV-Vis spectra, transmission electron microscopy (TEM), and X- ray diffraction (XRD) results revealed that the alloy was single phase with face- centered cube structure. The Au- Pt/Cysteine/glassy carbon electrode was prepared by self- assembling nanobimetallic particles on glassy carbon substrate modified with cysteine and was characterized with scanning electron microscopy (SEM). The average diameter of the particles was 12.6 nm. The electrochemical performance of Au- Pt/ Cysteine/glassy carbon electrode was studied by cyclic voltammetry method. The result showed that the electrode of Au- Pt/ Cysteine /glassy- carbon had good electrocatalytic activity for methanol oxidation.

Key words: Nanobimetallic particles, Au-Pt, Self-assemble