高效镍@钌核壳纳米催化剂及其电子耦合效应与电催化性能研究

设计高效稳定的析氧电催化剂对于金属-空气电池和电解水产氢等新能源技术的发展和推广应用具有重要的意义。针对传统钌(Ru)基催化剂在酸性析氧进程中易失电子被氧化腐蚀，导致结构稳定性差、催化活性降低的问题，本项目由过渡金属镍(Ni)和贵金属钌(Ru)构成的核壳纳米材料的设计和构建入手，借助传统核壳结构材料中内核颗粒施加给壳层的界面晶格应变及电子耦合效应，调节并优化Ni@Ru核壳纳米粒子在酸性析氧反应进程中的活性和稳定性。系统研究Ni@Ru核壳纳米粒子结构参数与催化性能的关系；解析核壳结构材料中的电子耦合效应，揭示电子耦合效应与材料电催化性能的本征联系，实现Ni@Ru核壳纳米粒子酸性析氧活性和电子耦合效应依赖的电学行为研究，为构筑高活性、高稳定性酸性析氧电催化剂提供设计思想与实现途径。

For the sake of the development and application of alternative energy technology, like metal-air battery, electrochemical water splitting and so on, it is of great significance to design efficient and stable oxygen evolution reaction (OER) electrocatalysts. In this project, to overcome the drawback that the traditional ruthenium (Ru) based catalysts are easily oxidized and corroded in the process of oxygen evolution in acid media, resulting in poor structural stability and catalytic activity, we focus on the design and fabrication of core-shell nanostructures consisting of transition metal nickel (Ni) and Ru (labeled as Ni@Ru). The activity and stability of Ni@Ru core-shell nanoparticles in the process of acid oxygen evolution are regulated and optimized by the interface lattice strain and electronic coupling effect imposed by the core particles on the shell in traditional core-shell materials. We will systematically study the relationship between the structural parameters of Ni@Ru core-shell nanoparticles and their catalytic performance, analyse of the electronic coupling effect in Ni@Ru core-shell nanoparticles, and trying to reveal the relationship between the electronic coupling and the catalytic performance of the core-shell nanoparticles. Implementation of the project could guide us in searching for high-efficient and stable OER electrocatalysts theoretically and technically.