The local atomic information about the interface between the 30 nm-thick Pt polycrystalline films and the solution with and without perfluorosulfonic acid polymers (Nafion) for the model cathode catalyst of fuel cell has been captured under electrochemical conditions using polarization-dependent total reflection fluorescence x-ray absorption near edge structure spectroscopy (PTRF–XANES). The results show that the formation of sub-monolayer-equivalent PtO or adsorbed hydrogen/oxygen species in the surface region can be successfully observed in the PTRF–XANES spectra when the thickness of the solution layer and the incidence angle are properly controlled. This capability enables us to examine the metal /(Nafion/) solution interface structure through XANES together with other surface analysis methods, which will enhance comprehensive understanding of the nature of the interface of the fuel cell system.

在电化学条件下，使用偏振相关的全反射荧光x捕获了有关30 nm厚的Pt多晶膜与含和不含全氟磺酸聚合物（Nafion）的燃料电池模型阴极催化剂溶液之间界面的局部原子信息。边缘结构光谱法（PTRF–XANES）的X射线吸收。结果表明，当溶液层的厚度和入射角得到适当控制时，可以在PTRF-XANES光谱中成功观察到亚单当量PtO或表面氢/氧吸附物种的形成。这种功能使我们能够通过XANES以及其他表面分析方法来检查金属/（Nafion /）溶液的界面结构，