Enabling High Activity Catalyst CoO@CeO for Propane Catalytic Oxidation via Inverse Loading.

Propane catalytic oxidation is an important industrial chemical process. However, poor activity is frequently observed for stable C-H bonds, especially for non-noble catalysts in low temperature. Herein, we reported a controlled synthesis of catalyst CoO@CeO-IE via inverse loading and proposed a strategy of oxygen vacancy for its high catalytic oxidation activity, achieving better performance than traditional supported catalyst CoO/CeO-IM, i.e., the T (temperature at 50% propane conversion) of 217 °C vs. 235 °C and T (temperature at 90% propane conversion) of 268 °C vs. 348 °C at the propane space velocity of 60,000 mL g h. Further investigations indicate that there are more enriched oxygen vacancies in CoO@CeO-IE due to the unique preparation method. This work provides an element doping strategy to effectively boost the propane catalytic oxidation performance as well as a bright outlook for efficient environmental catalysts.