Spatially Resolved In Situ Measurements of the Ion Distribution Near the Surface of Electrode in a Steady-State Diffusion in an Electrolytic Tank with Confocal Micro X-ray Fluorescence
Spatially Resolved In Situ Measurements of the Ion Distribution Near the Surface of Electrode in a Steady-State Diffusion in an Electrolytic Tank with Confocal Micro X-ray Fluorescence
复制标题
利用共焦微 X 射线荧光对电解槽中稳态扩散中电极表面附近的离子分布进行空间分辨原位测量
DOI：
10.1021/ac403188k
复制
发表时间：
2014-01-07
影响因子：
7.4
通讯作者：
Ding, Xunliang
中科院分区：
文献类型：
--
作者：
Peng, Song;Liu, Zhiguo;Ding, Xunliang
采用基于多毛细管聚焦X射线透镜和多毛细管平行X射线透镜的共焦显微X射线荧光（MXRF）技术，对电解槽稳态扩散过程中电极表面附近的离子分布进行了元素分辨和原位分析。测量对应于CuCl 2浓度的Cu K α荧光强度的标准曲线，以定量确定稳态扩散中电极表面附近的离子分布。采用共焦MXRF技术，原位测量了电解槽中电解质离子在电极表面的分布，分析了稳态时电解质浓度和槽电压对阴极表面Cu ~（2+）离子分布不均匀层形状的影响。共焦MXRF在电解槽内液体传质的原位空间分辨分析中具有潜在的应用价值。
Confocal micro-X-ray fluorescence (MXRF) technology based on a polycapillary focusing X-ray lens and a polycapillary parallel X-ray lens was used to carry out element-resolved and in situ analysis of ion distribution near the surface of the electrode in a steady-state diffusion in an electrolytic tank. The standard curve of the Cu K alpha fluorescence intensity corresponding to the concentration of CuCl2 was measured to quantitatively determine the ion distribution near the surface of the electrode in a steady-state diffusion. The distribution of the electrolytic ions around the surface of the electrode in the electrolytic tank was measured in situ, and the effects of the concentration of the electrolyte and the bath voltage on the shape of the layer with a nonuniform distribution of the Cu2+ ions near the cathode surface in a steady state were analyzed with the confocal MXRF. The confocal MXRF has potential applications in spatially resolved analysis of the liquid mass transfer in electrolytic tanks in situ.