ERI zeolite is a small-pore zeolite that has been rarely explored as a catalyst in the selective catalytic reduction of NO_x with ammonia (NH₃-SCR) as the performance has been considered to be limited by its insufficient hydrothermal stability. We herein report that a fast-synthesized ERI zeolite, which can be synthesized in only 2 h at a high temperature (210 °C), shows much enhanced hydrothermal stability than the conventional ERI zeolite due to the presence of less silanol defects. The fast-synthesized ERI zeolite with an optimal copper loading (equaling a Cu/Al ratio of 0.20) is demonstrated to be highly active in the NH₃-SCR, which even rivals Cu-SSZ-13 – the benchmark NH₃-SCR catalyst. Various characterization techniques are employed to characterize the copper species in the fast-synthesized ERI zeolite in order to understand its high hydrothermal stability and NH₃-SCR activity. The results indicate that the copper species sitting at different locations exhibit variant hydrothermal stability and NH₃-SCR activity, suggesting the importance of the interplay between the copper species and the zeolite host. With a deep understanding into the structure-activity relationship, this work presents that the fast-synthesized ERI zeolite holds potential to emerge as a robust NH₃-SCR catalyst for emission control.

ERI沸石是小孔沸石已在选择性催化还原的已很少探索作为催化剂NO _X与氨（NH ₃ -SCR）作为性能已被认为是由它的不足的水热稳定性的限制。我们在本文中报道，由于存在较少的硅烷醇缺陷，因此可以在高温（210°C）下仅2小时内合成的快速合成ERI沸石显示出比常规ERI沸石更高的水热稳定性。具有最佳铜负载量（等于0.20的Cu / Al比）的快速合成的ERI沸石在NH ₃ -SCR中表现出很高的活性，甚至可以与Cu-SSZ-13（基准NH _3）相媲美。-SCR催化剂。为了了解其高水热稳定性和NH ₃ -SCR活性，采用了多种表征技术来表征快速合成的ERI沸石中的铜。结果表明，位于不同位置的铜物种表现出不同的水热稳定性和NH ₃ -SCR活性，表明铜物种与沸石主体之间相互作用的重要性。对结构-活性关系有深刻的了解，这项工作表明，快速合成的ERI沸石具有成为控制排放的坚固NH ₃ -SCR催化剂的潜力。