Lu Tao, Lin Wuyang, Guo Yingchun, Shao Mengliu, Bai Yuanyuan, Tommaso Devis Di, Wang Xiaomei, Zhang Xu
Hebei Key Laboratory of Functional Polymers, School of Chemical Engineering and Technology, Hebei University of Technology, Tianjin 300130, China.
Department of Chemistry, School of Physical and Chemical Sciences, Queen Mary University of London, Mile End Road, London E1 4NS, UK.
J Colloid Interface Sci. 2025 Feb;679(Pt A):705-713. doi: 10.1016/j.jcis.2024.10.006. Epub 2024 Oct 5.
The "one-pot" cascade process involves multiple catalytic conversions followed by a single workup stage. This method has the capability to optimize catalytic efficiency by reducing chemical processes. The key to achieving cascade reactions lies in designing cascade catalysts with well-dispersed, stably immobilized, and accessible noble metal nanoparticles for multiple catalytic conversions. This work presents a strategy for creating long-lasting cascade catalysts by encapsulating Ru and Pd nanoparticles within multi-shell spongy-core porous microspheres (MS-SC-PMs). This cascade catalyst strategy enables the continuous hydrogenation of nitrobenzene to aniline and further to cyclohexylamine, demonstrating both high selectivity and conversion rates. Notably, this approach overcomes the typical challenges associated with noble metal nanoparticles, such as poor stability and recyclability, as it maintains its performance over ten consecutive cycles. Additionally, the MS-SC-PMs have the versatility to encapsulate various metal nanoparticles, providing catalytic versatility, scalability, and a promising avenue for designing long-lasting catalysts loaded with nanoparticles.
“一锅法”串联过程涉及多个催化转化步骤，随后是单一的后处理阶段。该方法能够通过减少化学过程来优化催化效率。实现串联反应的关键在于设计具有良好分散、稳定固定且可接近的贵金属纳米颗粒的串联催化剂，以进行多个催化转化。这项工作提出了一种通过将钌和钯纳米颗粒封装在多壳海绵核多孔微球（MS-SC-PMs）中来制备长效串联催化剂的策略。这种串联催化剂策略能够将硝基苯连续氢化为苯胺，并进一步氢化为环己胺，展现出高选择性和转化率。值得注意的是，这种方法克服了与贵金属纳米颗粒相关的典型挑战，如稳定性和可回收性差，因为它在连续十个循环中都能保持其性能。此外，MS-SC-PMs具有封装各种金属纳米颗粒的通用性，提供了催化通用性、可扩展性以及设计负载纳米颗粒的长效催化剂的一条有前景的途径。
