Acta Phys. -Chim. Sin. ›› 2014, Vol. 30 ›› Issue (9): 1681-1687.doi: 10.3866/PKU.WHXB201406193

• ELECTROCHEMISTRY AND NEW ENERGY • Previous Articles     Next Articles

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;
  • 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).


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