Tailor-designing environmental catalysts

该研究的重点是设计、制备和表征用于汽车排放控制的催化剂。目前制造的这些催化剂具有沿催化剂长度沿着均匀分布的活性催化剂位点。然而，反应梯度在操作期间演变，其包括温度、表面物质浓度和气体组分浓度。这表明，通过沿催化剂长度沿着制备活性位点浓度的设计梯度以利用这些反应参数梯度，可以获得改进的性能，最终导致降低的成本、改进的性能和可能改进的寿命。基于这一前提，将设计、开发和评估两种催化剂系统：氧化和选择性催化还原催化剂。

The focus of the proposed research is designing, preparing and characterizing catalysts for automotive emissions control. These catalysts are currently manufactured with a homogeneous distribution of active catalyst sites along the length of the catalyst. However, reaction gradients evolve during operation, which includes temperature, surface species concentrations and gas component concentrations. This indicates that improved performance could be attained by preparing a designed gradient in active site concentration along the catalyst length to take advantage of these reaction parameter gradients, ultimately resulting in reduced costs, improved performance and likely improved longevity. Based on this premise, two catalyst systems will be designed, developed and evaluated; oxidation and selective catalytic reduction catalysts.