学术讲座:Molecular Engineering of Advanced Electrochemical Interfaces
2019-05-13 16:36:43


邀请讲座人: Xiao Su 助理教授

简介:Xiao Su is an Assistant Professor in Chemical and Biomolecular Engineering at the University of Illinois, Urbana-Champaign (UIUC). He obtained his Bachelor in Applied Sciences in Chemical Engineering from the University of Waterloo in 2011. He completed his PhD in Chemical Engineering from MIT in 2016, working under the supervision of Professor T. Alan Hatton from Chemical Engineering and Professor Timothy F. Jamison from Chemistry. During his doctoral studies, Xiao received the MIT Water Innovation Prize and the MassCEC Catalyst Award for his work on electrochemically-mediated water purification. His research program pursues the molecular engineering of functional materials for advanced separations and process intensification. Xiao Su is also a 2019 Illinois Water Resources Center (IWRC) Fellow, a member of the international working group for the CDI & Electrosorption, and an Affiliate of the Department of Civil and Environmental Engineering at UIUC.

【报告题目】Molecular Engineering of Advanced Electrochemical Interfaces

时间: 5月27日 上午 10:00

地点: 材料学院 强度楼 210会议室

摘要:  Electrochemical interfaces have been an integral part of energy storage and electrocatalysis, and more recently, environmental processes based on electrosorption. In particular, adsorption-based electrochemical methods have recently shown great promise for desalination, due to their modularity and reusability. However, their implementation for selective ion recovery and water purification remains limited by lack of specificity of the electrode materials, and relatively high energetic costs. Redox-functionalized electrode materials offer an attractive platform for performing selective electrochemical separations. Organometallics and the associated metallopolymer complexes offer a wealth in flexibility in terms of metal/ligand design, and control of electronic properties.

First, the development of a range of redox-active metallopolymer electrodes is presented, with specific interactions towards anions, cations, and even proteins. The underlying intermolecular mechanisms are then unraveled by a combination of electronic structure calculations and spectroscopy, and leveraged for fine chemical separations. Second, we focus on electrochemical cell design, in which the cathode works in tandem with the anode; thus reducing energy costs, suppressing parasitic reactions, and as a result, enhancing ion-selective performance towards micropollutants of concern. Finally, the capabilities of redox-electrodes are leveraged towards not only selective capture, but tandem environmental transformation of emerging contaminants and heavy metal pollutants.

From a fundamental perspective, our work point towards the need elucidate fundamental mechanisms for selectivity, to improve process efficiency. From a practical perspective, electrochemically-responsive materials are expected to provide a sustainable and energy-efficient platform for chemical separations, water purification, and environmental remediation.

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