Cu/SAPO-34具有优异的富氧条件下NOx催化脱除能力、高温水热稳定性及抗积碳能力，已成为车用脱硝催化剂的研究热点。但关于不同晶粒Cu/SAPO-34催化剂的可控制备还未见报道，构效关系研究有待深入，NH3-SCR催化反应机理尚未明确。本课题通过采用高通量筛选技术，实现不同晶粒Cu/SAPO-34的可控制备；阐明Cu/SAPO-34晶粒、酸性及活性物种等结构参数与催化活性、高/低温水热稳定性及抗中毒（硫中毒、积炭、碱金属中毒）等性能之间的构效关系；利用酸性位/活性中心预毒化方法，结合原位EPR、原位DRIFTS、原位XRD及动力学表征等多种手段，揭示酸性、活性物种对氨吸附/迁移的影响机制，解析Cu/SAPO-34催化剂NH3- SCR催化反应马鞍形活性曲线的形成原因，完善铜基小孔分子筛SCR催化反应机理，为高性能材料的开发提供基础数据和理论指导。

Cu/SAPO-34 catalysts have become the focus in SCR research due to its superior SCR activity, excellent N2 selectivity, high hydrothermal durability and carbon deposition prevention.Presently, the controllable preparation of different particle sizes have not been reported. The structure-activity relationship of Cu/SAPO-34 catalyst need to be deepened. And the SCR reaction mechanism is still unclear. In this project, using high-throughput screening technology, we will achieve controllable one-step synthesis method of Cu/SAPO-34 for different particle sizes. The structure-activity relationship between particle size, acidity, active species and catalytic activity, high/low temperature hydrothermal stability, resistance to poisoning (sulfur poisoning, coke and alkaline metal poisoning) will be systematic investigated. By pre-poisoning of acid site and active site method combining in-situ technology and kinetics analysis, the complex SCR reaction process will be revealed. The cause of saddle-shaped curve during NH3-SCR reaction process will be intensively studied. The SCR reaction mechanism of copper-based small pore zeolite will be further improved. It will provide basic data and theoretical guidance for high-performance materials development.