Our group introduces a series of binary cobalt-based spinel oxides (Co_xMn_3-xO₄) confined within TS-1 zeolite synthesized via a simple co-impregnation method.  Optimizing the composition to Co₂MnO₄ yielded increased surface concentrations of active Co⁰ species and demonstrated a synergistic effect, resulting in a propylene formation rate of 2.43 mmol C₃H₆ g⁻¹ cat. min^-1 and selectivity exceeding 90% at 600 °C. This performance surpasses that of most reported Co-based catalysts. In situ reduction of these oxides during PDH results in well-dispersed Co⁰ species, which are crucial for the dehydrogenation process. The introduction of manganese regulates the acidity, redox properties, and Co³⁺/Co⁰ ratio of the catalyst, exhibiting a significant synergistic effect. The Co₂MnO₄ catalyst also exhibited excellent reusability, with facile regeneration removing coke deposits and demonstrating its superior structural stability for PDH applications. This work has been published in Chemical Engineering Journal.

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