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电化学(中英文) ›› 2014, Vol. 20 ›› Issue (4): 302-306.  doi: 10.13208/j.electrochem.130890

• 基础电化学近期研究专辑(武汉大学 陈胜利教授主编) • 上一篇    下一篇

Au(111)电极上CTAB吸脱附过程的循环伏安研究

陈玲,徐常登,叶进裕,甄春花,孙世刚*   

  1. 厦门大学 化学化工学院化学系,固体表面物理化学国家重点实验室,福建 厦门 361005
  • 收稿日期:2013-10-20 修回日期:2013-11-04 出版日期:2014-08-28 发布日期:2013-11-14
  • 通讯作者: 孙世刚 E-mail:sgsun@xmu.edu.cn
  • 基金资助:

    国家自然科学基金项目(No. 21229301,No. 21361140374)资助

Cyclic Voltammetric Studies in Adsorption of Cetyltrimethylammonium Bromide (CTAB) on Au(111) Electrode

CHEN Ling, XU Chang-deng, YE Jin-yu, ZHEN Chun-hua, SUN Shi-gang*   

  1. State Key Laboratory of Physical Chemistry of Solid Surfaces, College of Chemistry and Chemical Engineering, Xiamen University, Xiamen, Fujian, 361005,China
  • Received:2013-10-20 Revised:2013-11-04 Published:2014-08-28 Online:2013-11-14
  • Contact: SUN Shi-gang E-mail:sgsun@xmu.edu.cn

摘要: 本文运用循环伏安方法研究十六烷基三甲基溴化铵(CTAB)在Au(111)电极上的吸附行为. 首次给出CTAB在Au(111)电极上的循环伏安曲线,其0.18 V、0.27 V有两对可逆的特征电流尖峰,均受扩散控制,且与卤素离子种类有关. 研究表明,烷基铵阳离子的吸脱附及吸附层相转变与Au(111)电极表面结构密切相关.

关键词: 十六烷基三甲基溴化铵, Au(111)电极, 循环伏安

Abstract: Adsorption of cetyltrimethylammonium bromide (CTAB) on Au(111) electrode was investigated by cyclic voltammetry (CV). The results demonstrate that the adsorption of CTAB on Au(111) yields particular CV features. Both the adsorption of CTA+ and the phase change of the surfactant film are surface structure selective. Two pairs of stable sharp peaks that depend on halide species appear upon the adsorption of cationic surfactant on Au(111) electrode. The relationship between the peak current density and the scan rate indicates that the electron transfer reaction was controlled by diffusion process. These CV features are observed for the first time, and reflect the specific interaction between CTAB and Au(111). The results are of significance in understanding the interaction of CTAB with Au surface for shape-control synthesis of Au nanoparticles.

Key words: cetyltrimethylammonium bromide, Au(111) electrode, cyclic voltammetry

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