直流放电等离子体电化学系统中气—液界面的电荷及物质转移研究

等离子体电化学系统中存在大量新颖的物理化学过程，因此具有广泛的应用前景。目前虽然存在很多等离子体电化学的应用研究，然而人们对其应用的基础—气相等离子体与液体界面的电荷与物质转移过程—了解仍然有限，这极大地限制了等离子体电化学系统的应用。因此，本项目拟通过探索直流放电等离子体电化学系统来揭示其界面过程，从而为各种应用提供实验与理论基础。本项目将采用直流针-板型放电，利用多种等离子体及液体探测手段对等离子体及液体进行探测，结合获得的等离子体及液体参数，采用反应扩散模型对气—液界面进行分析，重点研究气—液界面的电荷和物质转移。在理解界面过程的基础上，探索由界面过程引起的液体与等离子体变化。并以等离子体水处理为例，检验调控气—液界面过程的可行性。本研究不仅能加深对等离子体电化学系统本质的理解，具有重要的科学意义，而且能进一步推进对等离子体电化学系统的各种应用，也具有重要的实用价值。

There exist many novel physical and chemical processes in the plasma electrochemistry, which makes the plasma electrochemistry able to be used in many applications. The research on applications of the plasma electrochemistry is already substantial, while knowledge on the basis of the applications—the charge and species transfer at the gaseous plasma-liquid interface— is still insufficient. This status strongly limits the development and applications of the plasma electrochemical systems. Therefore, by this project, we aim to uncover the processes of the gas-liquid interface by investigating a DC discharge plasma electrochemical system. Then, the findings can act as the theoretical and experimental basis for the future applications. A needle-plate type discharge will be used for the plasma electrochemical system, and a variety of techniques for plasma and liquid detections will be used to diagnose the plasma and the liquid properties. Combined with the obtaining parameters of the plasma and the liquid, a reaction-diffusion model will be used to analyze the gas-liquid interface. This study will be focused on the understanding of the charge and species transfer at the gas-liquid interface, and then we will explore the plasma and liquid changes induced by the gas-liquid interfacial processes. Moreover, we will perform the water treatment to demonstrate the feasibility of achieving more efficient utilization by regulating the gas-liquid interfacial processes. The implementation of this project will not only be of significance for science by enhancing the comprehension of the plasma electrochemistry, but of importance for practice by promoting the potential applications of the plasma electrochemistry.