本项目针对纳米电催化剂颗粒构效关系的精准测量机制，拟建立一种可以同时检测单个纳米颗粒结构性质与催化活性的限域空间单体电分析新方法。构建基于无线纳米腔电极的新型限域单颗粒碰撞电化学测量界面，对单个纳米电催化剂颗粒在纳米腔内的“电化学限域”可控传质过程，以及单个纳米颗粒撞击无线电极界面瞬间的“电容反馈”超快弱电流信号响应进行研究。探索单颗粒在纳米腔内复杂扩散过程、迁移过程的精准电化学调控机制，以及单颗粒碰撞在非法拉第、法拉第过程中分别引发的无线纳米腔电极表面电荷重排、电子转移信号响应机制等科学问题。综上，本项目提出的纳米电催化剂构效关系限域单颗粒测量新方法，为精准表征纳米电催化界面电荷转移过程提供了新思路，同时为大规模设计和筛选高性能纳米电催化剂奠定了基础。

This project is to build up a new electrochemical sensing interface based on the single nanoparticle collisions in wireless nanocavity electrodes. The controllable mass transfer of heterogeneous electrocatalytic nanoparticles under the "electrochemically confined effect" in nanocavity electrodes will be investigated. In the meantime, the ultrafast current response based on the "capacitance feedback" induced by the single nanoparticle collisions will also be studied. This project is expected to demonstrate a precise electrochemical control of the diffusion and migration pathway of single nanoparticles in nanocavity electrodes, as well as the mechanisms of the charge redistribution or charge transfer across wireless electrodes during the single particle collisions under faradaic or non-faradaic processes. The above progresses can eventually lead to the precision measurement of the intrinsic electrocatalytic activity of a single nanocatalyst.