Tunable Oxygen Vacancies in CeO 2 -Dolomite Catalysts for Gas-Phase Conversion of Glycerol to 1,2-Propanediol without External Hydrogen

Selective conversion of glycerol to 1,2-propanediol (1,2-PDO) provides a sustainable approach to the valorization of an unavoidable by-product in biodiesel industry. However, achieving selective cleavage of the primary hydroxyl group (C1–OH) to form 1,2-PDO under hydrogen-free conditions remains a challenge. Herein, we report a CeO2–dolomite-based catalyst prepared by mechanochemical ball milling and the catalyst can catalyze the conversion of gas-phase glycerol to 1,2-PDO under 0.4 MPa N2 witho