Low-temperature methanol-assisted CO2 hydrogenation populates intermediates over a Ce-promoted Cu/ZnO/MgO catalyst in a three-phase slurry reactor
Abstract
A novel methanol-assisted strategy for CO2 hydrogenation is demonstrated over a Ce-promoted Cu/ZnO/MgO catalyst in a three-phase slurry reactor, enabling methanol synthesis at an unprecedented low temperature of 150 °C. The unique catalyst formulation integrates CeO2 to enhance redox activity and generate oxygen vacancies, while ZnO facilitates H2 spillover, collectively optimizing intermediate formation and reaction pathways. In situ DRIFTS analysis reveals that pre-dosed methanol shifts the reaction mechanism toward methyl formate-mediated pathways, distinct from conventional high-temperature routes. This work presents a significant advancement in catalyst design and low-temperature operation for sustainable and energy-efficient methanol production from CO2.
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