Extracting the local electronic states of Pt polycrystalline films surface under electrochemical conditions using polarization-dependent total reflection fluorescence x-ray absorption near edge structure spectroscopy

Extracting the local electronic states of Pt polycrystalline films surface under electrochemical conditions using polarization-dependent total reflection fluorescence x-ray absorption near edge structure spectroscopy
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使用偏振相关全反射荧光 X 射线吸收近边缘结构光谱提取电化学条件下 Pt 多晶薄膜表面的局域电子态

DOI:
10.1088/2516-1075/abd1ca
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发表时间:
2021
影响因子:
2.6
通讯作者:
Asakura Kiyotaka
Asakura Kiyotaka
中科院分区:
--
文献类型:
--
作者:
Wakisaka Yuki;Uehara Hiromitsu;Yuan Qiuyi;Kido Daiki;Wada Takahiro;Uo Motohiro;Uemura Yohei;Yokoyama Toshihiko;Kamei Yutaro;Kuroda Seiichi;Ohira Akihiro;Takakusagi Satoru;Asakura Kiyotaka

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在电化学条件下,采用偏振依赖全反射荧光X射线吸收近边结构谱(PTRF-XANES)技术,研究了燃料电池模型阴极催化剂中30 nm厚的Pt多晶膜与含和不含全氟磺酸聚合物(Nafion®)溶液界面的局部原子信息.结果表明,适当控制溶液层厚度和入射角,可以在PTRF-XANES谱中成功观察到亚单层等效PtO或表面吸附氢氧物种的形成.这种能力使我们能够通过XANES与其他表面分析方法一起检查金属/(Nafion®/)溶液界面结构,这将提高对燃料电池系统界面性质的全面理解。
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.
使用 Kramers-Kronig 关系通过表面敏感全反射 X 射线光谱观察 NiO 表面还原为 Ni
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发表时间: 2016
影响因子: 1.5
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