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Palladium nanoparticles supported on core-shell and yolk-shell Fe3O4@nitrogen doped carbon cubes as a highly efficient, magnetically separable catalyst for the reduction of nitroarenes and the oxidation of alcohols
Journal of Catalysis ( IF 6.5 ) Pub Date : 2018-05-26 , DOI: 10.1016/j.jcat.2018.05.003
Siyavash Kazemi Movahed , Noushin Farajinia Lehi , Minoo Dabiri

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.



中文翻译:

负载在核壳和卵黄壳Fe 3 O 4上的钯纳米颗粒掺杂了氮掺杂的碳块,是一种高效的,可磁分离的催化剂,用于还原硝基芳烃和醇类的氧化

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。

更新日期:2018-05-26
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