Reduction of CO2 to methanol using renewable hydrogen is a promising but challenging strategy for carbon capture and utilization.

Conversion of CO 2 to value-added chemicals has been a long-standing objective, and direct hydrogenation of CO 2 to lower olefins is highly desirable but still challenging. Herein, we report a selective conversion of CO 2 to lower olefins through CO 2 hydrogenation over a ZnZrO/SAPO tandem catalyst fabricated with a ZnO-ZrO 2 solid solution and a Zn-modified SAPO-34 zeolite, which can achieve a selectivity for lower olefins as high as 80−90% among hydrocarbon products. This is realized on the basis of the dual functions of the tandem catalyst: hydrogenation of CO 2 on the ZnO-ZrO 2 solid solution and lower olefins production on the SAPO zeolite. The thermodynamic and kinetic coupling between the tandem reactions enable the highly efficient conversion of CO 2 to lower olefins. Furthermore, this catalyst is stable toward the thermal and sulfur treatments, showing the potential industrial application.

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