大气压等离子体射流诱导多孔材料内部放电的机理及特性研究

以催化剂为典型代表的多孔材料是一类重要的功能性材料。许多研究已证实低温等离子体能够显著提升多孔材料的性能，但是目前关于材料内部放电特性的理解尚比较粗浅。本项目围绕大气压等离子体射流（APPJ）诱导微米和纳米多孔材料内部放电的机制及物理-化学特性这一核心问题，采用光-电-像综合实验观测和诊断手段，辅以流体模型及流体与Monte Carlo模拟组合的混合模型仿真方法，共同揭示微间隙的击穿特性、放电的演化过程及主导的物理-化学机制；在此基础上，结合APPJ催化剂的典型应用，深入探讨等离子体催化剂“协同效应”的物理-化学内涵。项目成果可丰富微间隙的气体击穿理论，同时为高性能多孔材料的制备和活化提供借鉴。

Porous materials represented by catalysts are important functional materials. Many studies have demonstrated that low temperature plasma can significantly improve the performance of porous materials, however, the properties of discharges inside the pores are still poorly understood. This project aims at the mechanisms and physical-chemical properties of discharges induced by atmospheric pressure plasma jets (APPJs) inside the nanometer or micrometer pores, utilizing the comprehensive optic-electric-imaging experimental observation and diagnostic methods, with the aid of fluid modelling and hybrid modelling that is composed by fluid simulation and Monte Carlo simulation, to reveal the breakdown characteristics, the evolutions of discharge profiles and the dominant physical-chemical mechanisms in the micro-gaps. On the base of these finds, combining with the typical applications of APPJ catalysis, we try to investigate more profound physical-chemical content of the so-called “synergistic effect” in plasma catalysis. The findings of this research can supplement to more complete gas discharge theory in micro-gaps, and meanwhile, serve references to the preparation and activation of high-performance porous materials.