Yao Jennifer, Lahiri Nabajit, Tripathi Shalini, Riechers Shawn L, Ilton Eugene S, Chatterjee Sayandev, Buck Edgar C
Pacific Northwest National Laboratory 902 Battelle Blvd. P.O. Box 999 Richland WA 99354 USA
RSC Adv. 2022 Jul 4;12(30):19350-19358. doi: 10.1039/d2ra02501a. eCollection 2022 Jun 29.
We have developed a specialized microfluidic electrochemical cell that enables investigation of the electrochemical corrosion of microgram quantities of redox active solids. The advantage of downscaling is the reduction of hazards, waste, expense, and greatly expanding data collection for hazardous materials, including radioactive samples. Cyclic voltammetry was used to monitor the oxidation-reduction cycle of minute quantities of micron-size uraninite (UO) particles, from the formation of hexavalent uranium (U(vi)), UO and reduction to UO . Reaction progress was also studied with scanning electron microscopy. The electrochemical measurements matched those obtained at the bulk-scale and were consistent with characterization of the run products by X-ray photoelectron spectroscopy, scanning transmission electron microscopy, and atomic force microscopy; thus, demonstrating the utility of the microfluidic approach for studying radioactive materials.
我们开发了一种专门的微流控电化学池，能够对微克量的氧化还原活性固体进行电化学腐蚀研究。缩小规模的优势在于减少危害、废物、成本，并极大地扩展对包括放射性样品在内的危险材料的数据收集。循环伏安法用于监测微量微米级晶质铀矿（UO）颗粒的氧化还原循环，从六价铀（U(vi)）、UO的形成到UO的还原。还通过扫描电子显微镜研究了反应进程。电化学测量结果与在宏观尺度上获得的结果相匹配，并且与通过X射线光电子能谱、扫描透射电子显微镜和原子力显微镜对运行产物的表征一致；因此，证明了微流控方法在研究放射性材料方面的实用性。
