For high-temperature gas-phase reactions in the presence of steam such as the selective catalytic conversion of NO_x from mobile sources, the deactivation of catalysts often occur because of their poor hydrothermal stability. Herein, we successfully prepared a high-silica Cu/ZSM-5-PAD catalyst based on an effectively induced polymer (polyacrylamide) assisted deposition (PAD) strategy. The obtained catalyst exhibited excellent catalytic performance for NH₃-SCR in terms of activity, anti-hydrothermal aging and poison-resistant abilities. This excellent catalytic performance could be correlated with the encapsulation and confinement dispersion of Cu-based active species within the ZSM-5 molecular sieve channels, which dramatically optimized the catalytic properties and structural stability of the solid.

在蒸汽存在下的高温气相反应，如NO的选择性催化转化_X从移动源，催化剂失活往往因为它们的水热稳定性差发生。在此，我们成功地基于有效诱导的聚合物（聚丙烯酰胺）辅助沉积（PAD）策略制备了高硅铜/ ZSM-5-PAD催化剂。所得催化剂对NH ₃表现出优异的催化性能。-SCR在活性，抗水热老化和抗毒能力方面。这种出色的催化性能可能与ZSM-5分子筛通道内铜基活性物质的包封和封闭分散有关，从而极大地优化了固体的催化性能和结构稳定性。