Metallic Ni nanoparticles embedded in hierarchical mesoporous Ni(OH)(2): A robust and magnetic recyclable catalyst for hydrogenation of 4-nitrophenol under mild conditions
Metallic Ni nanoparticles embedded in hierarchical mesoporous Ni(OH)(2): A robust and magnetic recyclable catalyst for hydrogenation of 4-nitrophenol under mild conditions
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嵌入分级介孔 Ni(OH)(2) 中的金属 Ni 纳米粒子：一种坚固且磁性的可回收催化剂，用于在温和条件下氢化 4-硝基苯酚
DOI：
10.1016/j.poly.2019.02.045
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发表时间：
2019
期刊：
影响因子：
2.6
通讯作者：
Zhao Guoming
中科院分区：
文献类型：
--
作者：
Zhang Ningxin;Wang Xiangwen;Geng Longlong;Liu Zhongmin;Zhang Xiuling;Li Chunhui;Zhang Dashuai;Wang Zhigang;Zhao Guoming
设计具有高催化活性和稳定性的非贵金属催化剂对多相催化具有重要意义。在此，我们报告了一种镍纳米颗粒嵌入在一个三维纳米结构的Ni（OH）2，这是通过固态氧化还原策略合成。所得到的材料表现出互连的孔结构和高的比表面积，从而显示出优异的催化活性和稳定性的4-硝基苯酚（4-NP）的加氢在温和的条件下（1大气压和室温）。测得催化剂的反应速率常数和活化能分别为151.3 × 10− 3 min − 1和42.3kJ mol−1。此外，Ni/Ni（OH）2还表现出较高的超顺磁性，可通过外加磁铁进行分离，重复使用10次以上无明显失活，具有较高的可重复使用性。
The design of non-noble metal catalysts with high catalytic activity and stability is highly important for heterogeneous catalysis. Herein, we report a kind of Ni nanoparticles embedded in a 3D nanoarchitecture of Ni(OH)2, which was synthesized via an solid state redox strategy. The obtained material exhibited an interconnected pore structure and high surface area, thus displaying excellent catalytic activity and stability for the hydrogenation of 4-nitrophenol (4-NP) under mild conditions (1 atm and room temperature). The reaction rate constant and activation energy of the catalyst were determined to be 151.3 × 10−3min−1and 42.3 kJ mol−1, respectively. Moreover, Ni/Ni(OH)2also exhibited relatively high superparamagnetism properties; it could be separated facilely by using an external magnet and could be reused for at least ten times without obvious deactivation, exhibiting high reusability.