Metallic Ni nanoparticles embedded in hierarchical mesoporous Ni(OH)2: A robust and magnetic recyclable catalyst for hydrogenation of 4-nitrophenol under mild conditions

摘要: Abstract The design of non-noble metal catalysts with high catalytic activity and stability is highly important for heterogeneous catalysis. Herein, we report a kind Ni nanoparticles embedded in 3D nanoarchitecture Ni(OH)2, which was synthesized via an solid state redox strategy. obtained material exhibited interconnected pore structure surface area, thus displaying excellent the hydrogenation 4-nitrophenol (4-NP) under mild conditions (1 atm room temperature). reaction rate constant activation energy catalyst were determined to be 151.3 × 10−3 min−1 42.3 kJ mol−1, respectively. Moreover, Ni/Ni(OH)2 also relatively superparamagnetism properties; it could separated facilely by using external magnet reused at least ten times without obvious deactivation, exhibiting reusability.