Abstract The porous Co-based spinel composite oxides containing different transition metals (Cu, Fe, Ni, Mn, and Ce) were prepared by soft-template method for ethanol complete oxidation in air. The physicochemical properties of the prepared oxides were characterized by XRD, BET, H2-TPR, and O2-TPD. The results indicate that the transition metal ions can be dissolved into the Co3O4 lattice to form Co-based spinel oxide, which promote surface reactive oxygen species to be formed on the corresponding catalyst. The prepared Co-based spinel oxides have developed pore structure, and the specific surface area is larger than 80 m2·g−1, even up to 132 m2·g−1. The porous structure and high specific surface area can be traced back to the used soft-template reagent, and the pore size distribution and specific surface area can also be affected by the used transition metals. The synergistic effect from porous structure and surface reactive oxygen species can effectively promote ethanol oxidation to final product CO2. The porous Co-based spinel oxide containing Ce exhibits superior ethanol catalytic oxidation activity and high stability, the ethanol catalytic oxidation conversion and oxidation final product CO2 selectivity reached 99.7% and 99.1% at 200 °C, respectively. The results indicated that the porous Co-based spinel oxide catalyst has potential application value in ethanol oxidation elimination from air.

中文翻译：

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乙醇氧化软模板法制备多孔钴基尖晶石氧化物

摘要 采用软模板法制备了含有不同过渡金属（Cu、Fe、Ni、Mn、Ce）的多孔钴基尖晶石复合氧化物，用于乙醇在空气中的完全氧化。通过XRD、BET、H2-TPR和O2-TPD对制备的氧化物的理化性质进行了表征。结果表明，过渡金属离子可以溶解到 Co3O4 晶格中形成 Co 基尖晶石氧化物，促进表面活性氧物种在相应催化剂上的形成。制备的钴基尖晶石氧化物具有发达的孔隙结构，比表面积大于80 m2·g-1，甚至高达132 m2·g-1。多孔结构和高比表面积可以追溯到使用的软模板试剂，孔径分布和比表面积也会受到所用过渡金属的影响。多孔结构和表面活性氧的协同作用可以有效促进乙醇氧化为最终产物 CO2。含有Ce的多孔Co基尖晶石氧化物表现出优异的乙醇催化氧化活性和高稳定性，乙醇催化氧化转化率和氧化终产物CO2选择性在200℃下分别达到99.7%和99.1%。结果表明多孔钴基尖晶石氧化物催化剂在乙醇氧化消除空气中具有潜在的应用价值。含有Ce的多孔Co基尖晶石氧化物表现出优异的乙醇催化氧化活性和高稳定性，乙醇催化氧化转化率和氧化终产物CO2选择性在200℃下分别达到99.7%和99.1%。结果表明多孔钴基尖晶石氧化物催化剂在乙醇氧化消除空气中具有潜在的应用价值。含有Ce的多孔Co基尖晶石氧化物表现出优异的乙醇催化氧化活性和高稳定性，乙醇催化氧化转化率和氧化终产物CO2选择性在200℃下分别达到99.7%和99.1%。结果表明多孔钴基尖晶石氧化物催化剂在乙醇氧化消除空气中具有潜在的应用价值。