Ni-Cu-Ti多孔合金多维孔道调控及其协同电催化机理研究

降低电解水制氢能耗是可持续性发展清洁能源经济的重大需求之一，研发高效电催化阴极是解决这一难题的主要方向。本申请项目以提高电解水制氢阴极电催化活性及长期运行稳定性为目标，基于粉末冶金法制备多孔Ni-Cu合金材料的研究基础，引入第三组元Ti调控合金体系的催化位点，设计并制备新型多维孔道Ni-Cu-Ti多孔合金电极。采用多孔材料微结构表征技术、电催化反应的原位动态表征技术以及固体微观界面表征等技术，探索多维孔道Ni-Cu-Ti多孔合金阴极协同电催化析氢反应机理与反应过程中吸附扩散动力学。从表面反应及多维孔道结构上认识Ni-Cu-Ti多孔合金阴极电催化作用的本质，建立多孔合金电催化材料的成份－孔道结构－表/界面性质－电催化析氢性能之间的构效关系，进而实现高性能合金多孔阴极材料的功能导向制备。这将为电解水制氢高性能阴极材料的组分选择和结构设计提供理论依据，为清洁能源的生产和可持续发展拓宽新思路。

Compared with other methods for hydrogen generation depending on non-regeneration energy sources, the water electrolysis technology is a sustainable way to produce hydrogen which mainly relies on renewable energy sources. Extensive studies have been dedicated to the development of advanced cathode materials with high electro-catalytic performance during hydrogen evolution reaction (HER). Based upon understanding about pore formation and evolution mechanisms of porous Ni-Cu material by powder metallurgy, this research aims to design a novel porous Ni-Cu-Ti cathode with multi-structure and the introduction of Ti to precisely control the active sites. Characteristics of the porous structure, dynamic process of reactions on electrodes and the interface microstructure will be analyzed to explore the mechanisms of HER, as well as the absorption and diffusion process during hydrogen producing. Control process about composition, surface morphology and pore channel of the porous materials toward performance optimization will be also carried out in detail. The research will help reveal the fabrication and application regularities of porous alloy cathodes basing on theories concluded from the micro-level, which provides new insights to the researches on the development and effective running of cathode materials for water electrolysis.