Quantitative, In Situ Visualization of Metal-Ion Dissolution and Transport Using 1 H Magnetic Resonance Imaging
Quantitative, In Situ Visualization of Metal-Ion Dissolution and Transport Using 1 H Magnetic Resonance Imaging
复制标题
使用 1 H 磁共振成像定量、原位可视化金属离子溶解和传输
DOI：
10.1002/ange.201604310
复制
发表时间：
2016
影响因子：
--
通讯作者：
Bray J
中科院分区：
文献类型：
--
作者：
Bray J
在溶液中自由扩散的金属离子的定量映射在各种学科中都是重要的，并且对于电池中的溶解过程、金属腐蚀和制造部件的电镀/抛光特别重要。然而，大多数当前的技术是侵入性的，需要样品提取、插入电极、施加电势或包括分子传感器。因此，需要非侵入性地、原位地、定量地、三维（3D）地和真实的时间地可视化金属离子的分布的技术。 在这里，我们已经使用1H磁共振成像（MRI），使定量的三维地图显示的铜离子的分布演变，不直接可见的MRI，在铜的电溶解，具有高灵敏度和空间分辨率。图像对铜的形态、电解质中溶解的O2的消耗敏感，并且显示出Cu 2+离子在阳极上的溶解是不均匀的。
Quantitative mapping of metal ions freely diffusing in solution is important across a diverse range of disciplines and is particularly significant for dissolution processes in batteries, metal corrosion, and electroplating/polishing of manufactured components. However, most current techniques are invasive, requiring sample extraction, insertion of an electrode, application of an electric potential or the inclusion of a molecular sensor. Thus, there is a need for techniques to visualize the distribution of metal ions non‐invasively, in situ, quantitatively, in three dimensions (3D) and in real time. Here we have used1H magnetic resonance imaging (MRI) to make quantitative 3D maps showing evolution of the distribution of Cu2+ions, not directly visible by MRI, during the electrodissolution of copper, with high sensitivity and spatial resolution. The images are sensitive to the speciation of copper, the depletion of dissolved O2in the electrolyte and show the dissolution of Cu2+ions is not uniform across the anode.