The physicochemical and catalytic properties of low-cost metal mixed oxide catalysts have been researched and characterized. To explore catalysts, various characterization techniques such as BET and X-ray diffraction (XRD) have been utilized. Three distinct catalysts, C1(NiO-Co3O4/Silica), C2(NiO- Co3O4-ZnO/ Silica), and C3(NiO- Co3O4-BaO/ Silica), are synthesized with 20 wt% mixed oxide (NiO- Co3O4) supported on silica and doped with zinc/barium oxide, and then dried at 110C overnight and calcined at 350oC All three catalysts have been tested in an ethyl acetate saponification reaction, and the conversion of reactants is calculated. In comparison to the other catalysts, C2 (NiO-Co3O4-ZnO/ Silica), which is a combination of NiO-Co3O4/SiO2 doped with zinc oxide, show good catalytic activity. In terms of catalyst doping, the addition of zinc oxide to the Silica supported original composition boosted the catalytic activity for the saponification reaction compared to barium oxide and without doped.

中文翻译：

---

SiO2负载镍钴氧化物催化剂的物化性质及其催化活性

对低成本金属混合氧化物催化剂的物理化学和催化性能进行了研究和表征。为了探索催化剂，已经使用了各种表征技术，例如 BET 和 X 射线衍射 (XRD)。三种不同的催化剂，C1(NiO-Co3O4/二氧化硅)、C2(NiO-Co3O4-ZnO/二氧化硅)和C3(NiO-Co3O4-BaO/二氧化硅)，是用20 wt%负载的混合氧化物(NiO-Co3O4)合成的在二氧化硅上掺杂锌/氧化钡，然后在 110C 下干燥过夜并在 350oC 下煅烧所有三种催化剂都在乙酸乙酯皂化反应中进行了测试，并计算了反应物的转化率。与其他催化剂相比，C2（NiO-Co3O4-ZnO/二氧化硅）是NiO-Co3O4/SiO2掺杂氧化锌的组合，表现出良好的催化活性。在催化剂掺杂方面，