Research on Direct Oxidation of Methanol to Polyoxymethylene Dimethyl Ethers over NASICON-Based Catalytic Materials

Compared to the traditional aldol condensation route, the one-step oxidative method for producing DMMx directly from methanol is a green synthesis route with significant advantages. However, due to the complexity of the reaction, a balance must be struck between oxidation depth and C–O chain growth efficiency.

This imposes specific requirements on the design of catalysts with multifunctional active sites: the catalyst should possess appropriate oxidative activity, suitable acid strength distribution, and effective synergy between these two functions. To address these challenges, this study designed a sulfuric acid-modified molybdenum-doped NASICON catalyst, which demonstrated favorable catalytic performance in the one-step oxidative synthesis of DMMx from methanol.