The aim of this study is to show that α- and β-CoNi binary hydroxides nanostructures can be used as heterogeneous catalysts in the oxidation of benzyl alcohol, N-formylation of aniline, and the Claisen–Schmidt condensation. The catalysts were synthesized by hydrothermal method and characterized by XRD, FE-SEM/EDX, FT-IR, TGA, UV–vis and N₂ adsorption-desorption techniques. The α-phase is similar to layered double hydroxide (LDH), while β-phase is isostructural with brucite. In all of the three reactions, the conversion enhanced by increasing the amount of catalysts from 10 to 30 mg, and the catalytic activity of α-phase was better than β-phase. In benzyl alcohol oxidation, the best conversion for α- and β-phases was 90% and 80%, respectively, under solvent-free conditions. In N-formylation, the best yield for both catalysts was obtained 95% in solvent-free conditions. However, the time required for α-phase to reach this amount was a quarter of that for β-phase. For the Claisen–Schmidt condensation, the best yield was obtained at 90 °C, which was 70% and 50% for α- and β-CoNi binary hydroxides, respectively. Both catalysts were stable and subsequent to each step of recovery and reuse, no significant loss in activity was observed.

这项研究的目的是证明α-和β-CoNi二元氢氧化物的纳米结构可以用作多相催化剂，用于苯甲醇的氧化，苯胺的N-甲酰化以及Claisen-Schmidt缩合反应。通过水热法合成了催化剂，并通过XRD，FE-SEM / EDX，FT-IR，TGA，UV-vis和N ₂吸附-脱附技术对其进行了表征。所述α相类似，层状双氢氧化物（LDH），而β相是同结构水镁石。在所有三个反应中，通过将催化剂的量从10 mg增加到30 mg可以提高转化率，并且α相的催化活性优于β相。在苯甲醇氧化中，在无溶剂条件下，α相和β相的最佳转化率分别为90％和80％。在N-甲酰化中，在无溶剂条件下，两种催化剂的最佳收率均达到95％。但是，α相达到此数量所需的时间是β相所需时间的四分之一。对于Claisen-Schmidt缩合，在90°C时可获得最佳收率，对于α-和β-CoNi二元氢氧化物分别为70％和50％。两种催化剂都是稳定的，并且在回收和再利用的每个步骤之后，均未观察到活性的显着降低。