Co‐O‐Zn interface engineering for boosting CO2 hydrogenation to light olefins

The carbon dioxide (CO2) hydrogenation to light olefins (CO2‐to‐C2‐C4=) represents a promising approach for its high‐value utilization but faces the crucial challenges of low CO2 conversion efficiency and olefin selectivity. Herein, we develop an oxide–oxide interface engineering strategy to boost CO2‐to‐C2‐C4=. A high CO2 conversion efficiency of 27.4% and C2‐C4= yield of 15.3% with excellent stability for 200 h are achieved on optimized CoOx/ZnGa2O4–2.5/SAPO‐34 through the oxide–zeolite (OX‐ZEO) bifunctional tandem route. The well‐controlled Co‐O‐Zn oxide–oxide interface in CoOx/ZnGa2O4 facilitates the bidentate adsorption of CO2, enabling the exposed C atom to be attracted by spilled‐over H* from the heterolytic cleavage on adjacent Zn‐O. Accordingly, the preferentially produced HCOO* leads to effective CO2 conversion and selective generation of methanol precursor. Therefore, this oxide–oxide interfacial engineering offers a promising strategy for achieving highly efficient CO2‐to‐C2‐C4= through OX‐ZEO route.