中文摘要：

在这份报纸，我们描述一系列做钴的 Fe ₃ 经由在一个水的答案的化学一起沉淀的 O ₄ nanocatalysts。催化剂允许 chloronitrobenzenes 的加氢到 chloroanilines (CA ) 在绝对的水里并且在气压在低温度继续，导致百分之百近似让步并且选择。影响 CA 的收益的几个因素被调查。结果证明催化剂的合适的剂量是 ~ 底层的 10 mol.% ，和最佳的反应时间，反应温度，和反应压力是 20 min， 80 伳 ? 渠湡灯牡楴汣獥 ??????????????? 慮潮慣慴祬瑳

英文摘要：

In this paper, we describe the facile and effective preparation of a series of cobalt-doped Fe3O4 nanocatalysts via chemical coprecipitation in an aqueous solution. The catalyst allowed the hydrogenation of chloronitrobenzenes to chloroanilines （CAs） to proceed at low temperatures in absolute water and at atmospheric pressure, resulting in approximately 100% yield and selectivity. Several factors that influence the yield of CAs were investigated. The results showed that the suitable dosage of the catalyst was -10 tool.% of the substrate, and the optimal reaction time, reaction temperature, and reaction pressure were 20 min, 80 ~C, and atmospheric pressure, respectively. Under the optimal reaction conditions, the CA yield was as high as 98.4%, and the nitro reduction rate reached 100%, which indicates the excellent selectivity of the homemade catalyst. This process also overcomes the environmental pollution harms associated with the traditional process.