Developing highly efficient and cost-effective catalyst with tuned microstructure holds great promise in the reduction of nitroaromatic compounds under mild reaction conditions. Herein, we report a new Co@NC-MF catalyst with a fascinating hierarchical flower-like architecture in situ assembled from uniform Co@NC nanoneedles, which can function as a favorable platform for the efficient reduction of nitroaromatic compounds in the presence of NaBH₄. In addition with the structural advantage, the characterization and experimental results demonstrate the enormous advantage of interfacial synergistic catalysis in enhancing the catalytic performance. The outside electron-rich N-doped carbon layer as Lewis basic sites and the inside Co nanoparticles are responsible for the adsorption of 4-nitrophenol (4-NP) and generation of active hydrogen species, respectively. This work contributes to the construction of well-integrated composites with well-balanced interface synergy to boost the catalytic performance in various heterogeneous reactions.

开发具有可调整的微观结构的高效，经济高效的催化剂，在温和的反应条件下还原硝基芳族化合物方面具有广阔的前景。在此，我们报道了一种新型的Co @ NC-MF催化剂，该催化剂由均匀的Co @ NC纳米针原位组装而成，具有令人着迷的分层花状结构，可作为NaBH ₄存在时有效还原硝基芳族化合物的有利平台。。除具有结构优势外，表征和实验结果还证明了界面协同催化在增强催化性能方面的巨大优势。外部富含电子的N掺杂碳层（作为Lewis碱性位点）和内部Co纳米颗粒分别负责4-硝基苯酚（4-NP）的吸附和活性氢物种的产生。这项工作有助于构建具有良好平衡的界面协同作用的高集成度复合材料，以提高各种非均相反应的催化性能。