School of Chemistry, University of Birmingham, Birmingham, B15 2TT, UK.
School of Metallurgy and Materials, University of Birmingham, Birmingham, B15 2TT, UK.
Angew Chem Int Ed Engl. 2016 Aug 1;55(32):9394-7. doi: 10.1002/anie.201604310. Epub 2016 Jun 22.
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 used (1) H magnetic resonance imaging (MRI) to make quantitative 3D maps showing evolution of the distribution of Cu(2+) 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 O2 in the electrolyte and show the dissolution of Cu(2+) ions is not uniform across the anode.
定量绘制溶液中自由扩散的金属离子图谱在多个领域都非常重要，特别是在电池的溶解过程、金属腐蚀以及制造部件的电镀/抛光中。然而，目前大多数技术都是侵入性的，需要提取样本、插入电极、施加电势或包含分子传感器。因此，需要开发非侵入性、原位、定量、三维（3D）和实时可视化金属离子分布的技术。在这里，我们使用（1）H 磁共振成像（MRI）来制作定量 3D 图谱，显示铜电溶解过程中 Cu(2+)离子分布的演变，该分布在 MRI 下不可直接观察，具有高灵敏度和空间分辨率。这些图像对铜的形态、电解质中溶解氧的消耗敏感，并表明 Cu(2+)离子的溶解在阳极上不是均匀的。
