In the meantime, the development of non-noble metal heterogeneous catalysts has attracted much attention, due to their obvious advantages of low cost, comparable reactivity, practical separation, and recyclability . Specifically, the non-noble heterogeneous catalysts (like Fe2O3-based, Ni/TiO2, Co3O4-based catalysts mainly Fe, Co, Ni) using hydrogen sources have shown great potential in the hydrogenation of nitro compounds for the preparation of amines . Beller and his co-workers first reported a nitrogen-doped carbon layer encapsulated active Fe2O3 particles based catalyst, and they applied it in the hydrogenation of nitroarenes including the 3-nitrostyrene with 93% selectivity of 3-VA under a comparably mild conditions (120 °C , 50 bar H2, 16 h) . This group also developed the conversion of a homogeneous cobalt-phenanthroline (ligand) complex into heterogeneous cobalt oxide catalysts via immobilization on activated commercially available carbon and sub-sequent pyrolysis process. The amine ligands can not only affect cobalt particles on the carbon-nitrogen surface but also indirectly control the catalyst's activity and product's selectivity. The resulting N-doped Co3O4-based catalyst gave 91% 3-VA selectivity under slightly mild reaction conditions (120 °C, 50 bar H2, 6 h) . Later, Corma and his co-workers prepared non-N-doped monodispersed Co nanoparticles covered with thin carbon layers (Co@C) by thermal decomposition of a Co-EDTA complex. The carbon layers can protect the metallic Co from over-oxidation by air. Using the Co@C nanoparticles catalyst, 95% conversion of 3-nitrostyrene and 93% 3-VA selectivity were obtained under the conditions of 7 bar of H2, 120 °C . Recently, this group showed the synthesis of nano layered molybdenum disulfide cobalt-promoted materials (Co-Mo-S) via a one-pot hydrothermal synthesis . The optimized unsupported catalyst Co-Mo-S-0.39-180, which has a large number of active sites per unit volume, gave 99% reactivity and 91% 3-VA selectivity under optimized reaction condition (150 °C, 11 bar H2, 7h, Toluene). In the catalyst's stability test of 7 runs, the catalytic activity and product yield gradually dropped from 99% to 75% and 99% to 68% respectively. For the first time, this group also synthesized the Ni catalysts via yielding nano sized crystals of the metals on the surface of TiO2 support and embedding the exposed (111) and (100) crystal faces using a simple procedure for catalyst activation. The resulting Ni/TiO2 catalyst could change the relative rate for hydrogenating competitive groups present in the molecule by almost 2 orders of magnitude and showed 90% 3-VA selectivity, 93% conversion under fairly harsh reaction conditions (450 °C , 15 bar H2, x h, solvent) . Here it also needs to specifically mention, also using other hydrogen donor ammonia borane like previously Song's reported S-PTSAu catalyst system , Sun and his co-workers recently report the novel synthesis method of a highly efficient Cu/WO2.72 catalyst for chemo-selective hydrogenation of 3-nitrostyrene. By controlling catalytic activity and selectivity of Cu nanoparticles (NPs) through anchoring on WO2.72 nanorods, the Cu/WO2.72 catalyst showed >99% yield of 3-VA under mild reaction conditions (25 °C , 3 equiv. NH3• BH3, EtOH, 1.5 h). Due to the strong interfacial interaction between Cu NPs and WO2.72, the WO2.72 could activate and stabilize Cu NPs. And the Cu/WO2.72 catalyst maintained its initial activity and selectivity even after six catalytic cycles.