CoCu Spinel Nanoflower for High‐Efficiency Catalytic Oxidation of Toluene

The catalytic oxidation of toluene holds considerable theoretical and practical importance for the improvement of air quality and the safeguarding of human health. Nevertheless, enhancing the efficiency of toluene oxidation continues to pose a significant problem to be overcome. Recently, morphology optimization and bimetallic strategy have emerged as the most effective approaches for enhancing catalytic performance. Herein, variety of CoCu oxide catalysts with a spinel nanoflower structure were fabricated using a solvent thermal method combined with a sodium borohydride reduction process. Among the catalysts examined, the CoCuO‐5 catalyst demonstrates superior morphology and catalytic activity. This was caused by the advantageous morphology of the nanoflower and the synergistic effects arising from the combination of Cu and Co components. The emergence of nanoflower structures significantly enhances the specific surface area following reduction, thereby facilitating an improvement in catalytic activity. Cu is introduced into the system increases the concentration of oxygen vacancy and accelerates the redox cycle of Co 2+ /Cu 2+ ↔ Co 3+ /Cu + . This work exhibits a prospective strategy for the degradation of volatile organic compounds found in atmospheric pollutants.