物理化学学报 >> 2014, Vol. 30 >> Issue (9): 1681-1687.doi: 10.3866/PKU.WHXB201406193

电化学和新能源 上一篇    下一篇

单分散PtNi纳米粒子特殊的红外光学性能

周新文1, 杜娟娟1, 孙世刚2   

  1. 1. 三峡大学生物与制药学院, 湖北宜昌 443002;
    2. 厦门大学固体表面物理化学国家重点实验室, 化学化工学院化学系, 福建厦门 361005
  • 收稿日期:2014-05-12 修回日期:2014-06-19 发布日期:2014-08-29
  • 通讯作者: 周新文, 孙世刚 E-mail:xwzhou@ctgu.edu.cn;sgsun@xmu.edu.cn
  • 基金资助:

    国家自然科学基金(21229301,21403126)和湖北省教育厅重点项目(D20131302)资助

Anomalous IR Optical Properties of Monodispersed PtNi Nanoparticles

ZHOU Xin-Wen1, DU Juan-Juan1, SUN Shi-Gang2   

  1. 1. College of Biological and Pharmaceutical Science, China Three Gorges University, Yichang 443002, Hubei Province, P. R. China;
    2. Department of Chemistry, College of Chemistry and Chemical Engineering, State Key Laboratory of Physical Chemistry of Solid Surface, Xiamen University, Xiamen 361005, Fujian Province, P. R. China
  • Received:2014-05-12 Revised:2014-06-19 Published:2014-08-29
  • Contact: ZHOU Xin-Wen, SUN Shi-Gang E-mail:xwzhou@ctgu.edu.cn;sgsun@xmu.edu.cn
  • Supported by:

    The project was supported by the National Natural Science Foundation of China (21229301, 21403126) and Research Foundation of Education Bureau of Hubei Province, China (D20131302).

摘要:

采用电位置换反应以及化学还原法制备了单分散PtNi 纳米粒子,循环伏安结果显示该纳米粒子在0.1mol·L-1硫酸介质中对CO的氧化表现出比本体Pt 电极更好的电催化活性. 以CO为探针分子,采用电化学原位红外光谱研究了PtNi 纳米粒子上的特殊红外光学性能. 结果表明,PtNi 纳米粒子无论是在玻碳电极还是在金电极上,均表现出对称的双极谱峰,同时给出很强的增强效应. 论文研究结果有助于进一步了解低维纳米材料特殊红外性能的本质.

关键词: 电位置换反应, 单分散PtNi 纳米粒子, 双极红外特征, 原位电化学傅里叶变换红外光谱

Abstract:

Monodispersed PtNi nanoparticles were synthesized by galvanic displacement reaction and chemical reduction. The monodispersed PtNi nanoparticles demonstrate, by cyclic voltammetry, enhanced electrocatalytic properties for CO oxidation in 0.1 mol·L-1 H2SO4 solution compared with bulk Pt electrode. In situ electrochemical Fourier transform infrared (FTIR) spectroscopy using CO as the probe molecule was studied. The CO adsorbed on either the PtNi/GC (glassy carbon) electrode or PtNi/Au electrode exhibits characteristics of a symmetric bipolar IR feature with a strong enhancement factor. The results of this paper contribute to the understanding of the special properties and origin of the anomalous IR properties of lowdimensional nanomaterials.

Key words: Galvanic displacement reaction, Monodispersed PtNi nanoparticle, Bipolar IR feature, In situ electrochemical FTIR spectroscopy

MSC2000: 

  • O646