高效Ag基阳极析氧催化剂的原位调控构筑及其电解水制氢研究

阳极析氧催化剂是可再生能源驱动电解水制氢技术的关键，原位Ag基阳极析氧催化剂具有析氧过电位低、电解质匹配性高的优点，但析氧效率偏低，严重影响其应用。本项目拟通过调控原位制备条件构筑具有新型非晶结构和组成的Ag基析氧催化剂，解决析氧催化剂其晶体结构中分子价键较强的问题，促进质子耦合电子转移过程中催化剂的循环，提高催化剂的循环效率；优化与阳极析氧催化剂高效匹配的电解质体系，强化电解质阴离子的质子载体效应，进而提高析氧速率和制氢效率。系统研究催化剂的构效关系，阐明原位制备机理及电解催化反应机理，为制备新型、高效Ag基析氧催化剂提供理论依据与指导。

Anodic oxygen evolving catalysts are the key technology of the renewable energy driven water splitting. Ag-based anodic oxygen evolving catalysts in situ have the advantages of lower oxygen evolving overpotential and higher electrolyte matching. However, the lower oxygen evolving efficiency seriously affects their application. The project intends to build the Ag-based oxygen evolving catalysts with novel and amorphous structure and composition by the modulation of the preparation condition in situ, weakening molecule covalent bond intensity in the crystal structure, promoting the catalystic cycle of proton-coupled electron transfer process, and improving the catalystic cycle efficiency. In addition, the efficient matching electrolyte system with anodic oxygen evolving catalyst will be optimized to strengthen the proton carrier effect of electrolyte anions. The oxygen evolving rate and hydrogen produciton efficiency will be improved by the two pathways. The catalyst structure-activity relationship, preparation mechanism in situ and electrolysis catalytic mechanism will be researched in detail to discover the novel and excellent efficient anodic oxygen evolving catalytic materials.