Tailor-designing environmental catalysts

研究的重点是汽车尾气排放控制催化剂的设计、制备和表征。目前制造的这些催化剂具有沿催化剂长度均匀分布的活性催化剂位点。然而，在操作过程中，反应梯度会发生变化，包括温度、表面物质浓度和气体组分浓度。这表明，可以通过沿着催化剂长度制备设计的活性位点浓度梯度来提高性能，从而利用这些反应参数梯度，最终降低成本，提高性能并可能延长寿命。在此前提下，将设计、开发和评价两种催化剂体系；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.