多级孔道复合电极原位集成及其异相催化基础研究

研发高效廉价的电催化剂是电解水大规模产业化的技术关卡，也是减少环境污染及实现可再生清洁能源利用的重要途径之一。本项目应对目前基础研究中的高活性电催化剂难以向大规模应用移植的瓶颈，突破电催化剂设计思维定势及理论研究的局限，开展过渡金属原位集成多孔复合电催化材料的制备与性能研究：以纸型Ni-Me(Me=Co,Fe)合金多孔支撑体的创制为突破口，提出借支撑体金属源原位集成NiMePx/NiMe复合材料，从材料的表/界面组成及空间结构上同时调控其综合电催化性能；在此基础上，揭示不同类型活性中心的异相催化作用机理，探明多级孔道结构对催化传质的影响机制，同时建立基于宏观特性的电解水系统能量分析模型与基于微观分析的电极/溶液界面及孔道传质模型。本项目的执行将为面向电解水行业活性物质整合利用与催化效应的高效表达提供思路与研究方法，缩小电催化基础研究向应用扩展的技术鸿沟，助力能量转换领域产业高值化发展。

Development of low-cost, high-performance, and bifunctional electrocatalysts for water splitting is essential for renewable and clean energy technologies. Confronted with the great gap between the promising electrocatalysts and large scale production, this project manages to break the limits of the fundamental study and design stereotype of electrocatalical materials, which includes the in-situ fabrication and mechanism study of multi-porous integrated electrocatalysts for water splitting: basing on the exploration of paper porous Ni-Me (Me=Co,Fe) alloy, the in-situ integration of self-supported NiMePx/NiMe electrocatalyst is proposed to promote its comprehensive electrocatalytic performance by simultaneously regulating the composition of surface/interface and multi-porous structure. Based on the controllable fabrication, the heterogeneous catalytic mechanism of active sites and the in-depth effects of the multi-porous structure on the electrocatalytic performance will be revealed. At the same time, theoretical models of the energy analysis and the mass transfer process at electrode/electrolyte interface as well as inside the channels will be established. The implementation of this project will pave a new way for the efficient application and the integrated utilization of active electrocatalysts in terms of water splitting, so as to narrow the technological gap between the fundamental research of electrocatalytic system and the large-scale application, and may also boost the high-value development of the industry in the field of energy conversion.