本项目从金属有机物框架（MOFs）复合材料的设计与应用出发，提出一种“片-片三维分级组装”策略，用于超薄MOFs纳米片/还原氧化石墨烯（UMOFNs/rGO）三维等级复合电催化剂的构建，并研究材料结构与析氧反应（OER）增效催化之间的构效关系。针对传统MOFs材料在电催化过程中面临的传质受阻、金属活性中心暴露受限及导电性差的技术难题，设计并制备出结构可控、性质可调、组成可变的复合电催化剂。探究复合电催化剂的复合方式、UMOFNs的生长取向及其活性金属中心的调变规律，获得复合电催化剂结构及组成控制途径，阐明其界面生长机制。围绕以OER为电催化模型反应的性能评价过程，重点探讨催化剂结构与组成对电催化活性及稳定性的影响，阐明三维等级结构及异相金属中心增效机制；进而明确催化活性中心及催化机理。通过这些科学问题的研究和探索，解决传统MOFs基电催化剂存在的瓶颈，为高效电催化剂的设计提供技术支撑。

Starting from the design and applications of metal-organic frameworks (MOFs) hybrid materials, this project proposes a “sheet-on-sheet three-dimensional hierarchical assembly” strategy for the construction of “sheet-on-sheet” ultrathin metal-organic framework nanosheet/reduced graphene oxide (UMOFNs/rGO) three-dimensional hierarchical hybrid electrocatalyst and further explores the relation between the structure and enhanced catalytic performance in oxygen evolution reaction (OER). To solve the technical problems of traditional MOFs materials in electrocatalysis process including limited interior mass transfer and exposure metal active centers, and poor electro-conductivity, this project aims to design and synthesis of UMOFNs/rGO hybrid electrocatalyst with controllable structures, properties and compositions. The hybrid pathway, growth orientation and regulation of active centers of UMOFNs/rGO will be investigated to achieve the structure control, characterization method and finally clarification of the interfacial growth mechanism. OER will be chosen as the model reaction to emphatically explore the effect of the structure and composition of UMOFNs/rGO on the electrocatalytic activity and stability. On this basis, the active center will be identified and the catalytic mechanism will be clarified. By studying these scientific problems, the existed bottlenecks of traditional MOFs-based electrocatalysts will be solved. This project will provide technical support for the design of high-performance electrocatalysts.