The preparation of palladium nanoparticles (Pd NPs) supported on Fe₃O₄@nitrogen doped carbon (N-C) core-shell (C-S) and yolk–shell (Y-S) nanostructures is reported. The Fe₃O₄@N[email protected] C-S nanostructures were synthesized by two different methods. The first method included two steps: (i) the annealing treatment of the Fe₂O₃@polydopamine (PDA) under a gas mixture of Ar/H₂ flow and (ii) the decorating Pd NPs on the surface of annealed structures by sodium borohydride as a reducing reagent. The second method, the in-situ reduction of Fe₂O₃ and Pd²⁺ in the structure of Fe₂O₃@[email protected]²⁺ by annealing treatment under H₂ flow as a reducing reagent led to Fe₃O₄@N[email protected] C-S nanostructure. Additionally, the Y-S nanostructures were synthesized by using a HCl solution as an effective etching reagent to the partially etch the Fe₃O₄. Four types of Pd-based catalysts were tested in the selective reduction of p-nitrophenol (p-NP) to p-aminophenol (p-AP). Different catalytic activities were obtained through these catalysts. Furthermore, the reduction of nitroarenes and the oxidation of benzylic alcohols were also studies.

报道了在Fe ₃ O ₄氮掺杂碳（N -C）核-壳（CS）和卵黄-壳（YS）纳米结构上负载的钯纳米颗粒（Pd NPs）的制备。通过两种不同的方法合成了Fe ₃ O ₄ @ N [受电子邮件保护的] CS纳米结构。第一种方法包括两个步骤：（i）在Ar / H ₂气流混合气体下对Fe ₂ O ₃ @聚多巴胺（PDA）进行退火处理，以及（ii）用钠装饰退火结构表面上的装饰性Pd NPs硼氢化物作为还原剂。第二种方法，原位还原的Fe ₂ ö ₃和Pd ²⁺在Fe的结构₂ ö ₃ @ [电子邮件保护] ²⁺通过在H退火处理₂为导致铁的还原试剂流₃ ö ₄ @ Ñ [电子邮件保护] CS纳米结构。另外，通过使用HCl溶液作为部分蚀刻Fe ₃ O ₄的有效蚀刻剂来合成YS纳米结构。四种类型的基于Pd的催化剂在选择性还原进行了测试p硝基苯酚（p -NP）至p氨基苯酚（p-AP）。通过这些催化剂获得了不同的催化活性。此外，还研究了硝基芳烃的还原和苄醇的氧化。