School of Environmental and Safety Engineering, North University of China, Taiyuan 030051, China.
Dalton Trans. 2019 Feb 12;48(7):2345-2351. doi: 10.1039/c8dt04717k.
Metal nanoparticles (NPs) supported on nitrogen-doped porous carbon (NPC) are one type of promising heterogeneous catalysts. The tuning and understanding of metal-support interactions are crucial for the design and synthesis of highly durable and efficient heterogeneous catalytic systems. Here, we present an effective strategy to integrate ultrafine metal NPs into NPC via utilizing a covalent organic gel (COG) as the precursor for the first time. The ruthenium (Ru) NPs were uniformly dispersed in NPCs with the average size as low as 1.90 ± 0.4 nm. Irrespective of their ultrafine size, Ru NPs showed unprecedented stability and recyclability in Ru-catalyzed reduction of nitrobenzene and were greatly superior to commercial Ru/C and NPC-supported Ru NPs synthesized by the traditional post-loading method. This synthetic strategy can be extended to the synthesis of other metal or alloy NPs for a variety of advanced applications.
负载于氮掺杂多孔碳（NPC）上的金属纳米颗粒（NPs）是一类很有前途的多相催化剂。调控和理解金属-载体相互作用对于设计和合成高稳定性和高效的多相催化体系至关重要。在这里，我们首次提出了一种将超细微金属 NPs 有效整合到 NPC 中的策略，即利用共价有机凝胶（COG）作为前体。Ru NPs 以低至 1.90 ± 0.4nm 的平均粒径均匀分散在 NPC 中。尽管其粒径超细微，Ru NPs 在 Ru 催化的硝基苯还原反应中仍表现出前所未有的稳定性和可循环性，优于商业 Ru/C 和通过传统后负载法合成的 NPC 负载 Ru NPs。这种合成策略可以扩展到其他金属或合金 NPs 的合成，以实现各种先进应用。
