In this work possible reaction pathways of NO_x were investigated for a three-way catalyst on a synthetic gas test bench with a focus on intermediately produced NH₃ and N₂O. NH₃ formation during a typical lean-to-rich transient was verified. Further experiments were carried out in Ar atmosphere allowing to directly determine the N₂ selectivity. It could be shown that the catalyst's oxygen storage capacity (OSC), which is implemented by addition of CeO₂ to the washcoat material, plays a significant role and that NO can fill the oxygen storage in the absence of O₂. Further, no nitrogen species were found to be stored. Also, intermediately produced NH₃ was oxidized by stored oxygen with a high selectivity to N₂. As soon as the OSC was fully exhausted, NH₃ dissociated, leading to the formation of N₂ and H₂. The presence of side products and secondary emissions strongly depends on the actual operating conditions.

在这项工作中NO的可能的反应途径_X进行了研究用于三元催化剂的合成气体测试台上，重点放在中间产生NH ₃和N ₂ O. NH ₃在一个典型的稀到富瞬态证实形成。在Ar气氛中进行了进一步的实验，可以直接确定N _2的选择性。可以表明，通过向修补基面涂料中添加CeO ₂来实现催化剂的储氧能力（OSC）发挥了重要作用，并且在没有O ₂的情况下NO可以填充储氧量。此外，没有发现氮的种类被存储。另外，中间产生的NH₃被储存的氧具有高的选择性氧化为N ₂。OSC完全耗尽后，NH ₃分解，导致形成N ₂和H ₂。副产物和二次排放物的存在在很大程度上取决于实际操作条件。