Citation: ZHOU Xin-Wen, DU Juan-Juan, SUN Shi-Gang. Anomalous IR Optical Properties of Monodispersed PtNi Nanoparticles[J]. Acta Physico-Chimica Sinica, ;2014, 30(9): 1681-1687. doi: 10.3866/PKU.WHXB201406193
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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.
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