Catalytic reduction of 4-NP containing wastewater is highly desirable for the practical treatment of industrial wastewater. As one of the most well-established categories of coordination compound, Prussian Blue analogues (PBAs) have been found to show promising catalytic activities for 4-NP reduction. However, the nanoscale particle size hinder its application because of difficult separation, easy to loss during the recycling process and potential ecotoxicity. In this work, microstructured catalyst were prepared by in-situ growth of PBAs onto copper foam, and its catalytic performance for the hydrogenation of 4-NP to 4-aminophenol (4-AP) was investigated. Results showed that highly dispersed PBAs with size of ~ 350 nm were homogenously formed over the surface of copper foam. The structured catalyst exhibited good catalytic activity with conversion of 100% within 4 min, and with an activation energy (E_a) of 15.16 kJ·mol⁻¹ and turn over frequency (TOF) of 0.171 s⁻¹. These are comparable to most catalysts that have been reported. In addition, a homemade continuous flow catalysis system was constructed and the performance of the catalyst was investigated. Furthermore, no obvious deactivation was observed even after 6 cycles of catalytic reduction of 4-NP, showing its good catalytic stability and reusability. This study put forward a feasible approach to develop PBAs based catalyst for the practical application in industry.

对于工业废水的实际处理，非常需要催化还原含4-NP的废水。作为最成熟的配位化合物类别之一，普鲁士蓝类似物（PBA）被发现对4-NP还原显示出有希望的催化活性。然而，由于难以分离，在回收过程中容易损失以及潜在的生态毒性，纳米级粒径阻碍了其应用。在这项工作中，通过在铜泡沫上原位生长PBAs制备了微结构催化剂，并研究了其将4-NP氢化为4-氨基苯酚（4-AP）的催化性能。结果表明，在泡沫铜表面上均匀形成了〜350 nm的高度分散的PBA。E _a）为15.16 kJ·mol ^-1，翻转频率（TOF）为0.171  s ^-1。这些可与已报道的大多数催化剂相媲美。此外，构建了自制的连续流催化系统，并研究了催化剂的性能。此外，甚至在6-NP催化还原的6个循环后也没有观察到明显的失活，显示出其良好的催化稳定性和可重复使用性。这项研究提出了一种可行的方法来开发基于PBAs的催化剂以在工业中实际应用。