Cobalt oxide (Co₃O₄) materials with specific structure have shown great potential as highly efficient catalysts in the oxidation reactions. In this work, a novel hierarchical flower-like Co₃O₄ was synthesized by the imidazolate-induced hydrothermal and subsequent thermolysis method. The effect of reaction parameters as well as the phase evolution of the flower-like structure was investigated in detail. For comparison, a rod-like Co₃O₄ was also prepared with urea under similar conditions. The morphology-dependent effect of Co₃O₄ towards toluene oxidation was studied. Moreover, the physicochemical properties of Co₃O₄ were analyzed by various characterization techniques. The flower-like Co₃O₄ catalyst presented a higher catalytic activity for toluene oxidation than the rod-like Co₃O₄, which was associated with hierarchical flower-like morphology, reactive exposed planes, abundant adsorbed oxygen species at surface and better low-temperature reducibility.

具有特定结构的氧化钴（Co ₃ O ₄）材料已显示出作为氧化反应中高效催化剂的巨大潜力。在这项工作中，通过咪唑盐诱导的水热和随后的热解方法合成了一种新颖的分层花状Co ₃ O ₄。详细研究了反应参数的影响以及花状结构的相演化。为了比较，在类似条件下也用尿素制备了棒状的Co ₃ O ₄。研究了Co ₃ O ₄对甲苯氧化的形态依赖性。此外，Co ₃的理化性质通过各种表征技术分析O ₄。与棒状Co ₃ O _4相比，花状Co ₃ O ₄催化剂对甲苯氧化的催化活性更高，这与层状花状形态，反应性暴露平面，表面吸附的氧种类丰富以及较低的低位有关。 -温度还原性。